Firehole Outdoors' Slotted Tungsten Stones are the top pick at $8.95 per 24-pack, the only line here that publishes its own alloy density (about 18 g/cm3) alongside a size run from 1.5mm to 4.5mm. Wapsi's Tungsten Slot Beads are the value pick, $3.25 to $6.95 per 10-pack depending on size and color, the cheapest per-bead cost of the four. Hareline's slotted line (the two sizes this site links to, 3.2mm and 3.8mm) carries the deepest color selection, and Umpqua's slotted bead is the one built to match a named jig hook out of the box. All four tie onto the same jig-style hooks that carry Perdigons, Frenchies, and Walt's Worms.

The variable that decides this category is whether the bead's slot width and inside diameter match the hook you are tying on, ahead of price or color, because a bead that will not seat flush against the hook eye throws off the fly's balance and its sink rate no matter how much tungsten it carries.

The picks at a glance

Pick Best for Price (as of September 2026) Distinguishing spec
Firehole Outdoors Slotted Tungsten Stones All-around; widest size run in one line $8.95 per 24-pack (18 at 4.0mm, 12 at 4.5mm) 95% tungsten alloy, about 18 g/cm3, slot cut for 60 and 90 degree jig hooks
Wapsi Tungsten Slot Beads Value pick; lowest per-bead cost $3.25 to $6.95 per 10-pack 6 sizes, 2.0mm to 4.8mm, fly-shop only
Hareline Tungsten Slotted Beads Deepest color selection $14.34 (3.2mm) to $22.74 (3.8mm) per 20-pack About 26 colors per size across 8 sizes, 1.5mm to 5.5mm
Umpqua Tungsten Slotted Beads Matching a named competition jig hook $8.99 to $24.99 per 10 or 20-count pack Sized to the Umpqua Competition C400 and Tiemco jig hooks

How to choose tungsten beads

Density and sink rate

A tungsten bead is not pure tungsten. Pure tungsten is brittle and hard to press into a clean bead, so manufacturers sinter tungsten powder with a small percentage of nickel and iron. Firehole publishes the number for its own Stones: 95% tungsten, which the company puts at about 18 g/cm3, roughly 1.6 times the density of lead. Firehole also notes that alloy purity moves weight less than most tyers assume. Going from a 90% to a 97% alloy at the same 3.0mm diameter changes weight by about two hundredths of a gram, where stepping up one full bead size changes it by about twelve hundredths. Size does more work than purity.

Wapsi states its own beads run twice as heavy as brass and heavier than lead-core beads of the same size. That is why tungsten replaced brass as the default competition bead: the same diameter reaches the bottom of a bucket faster because more mass is packed into the same sphere. A slim Perdigon tied on a 2.8mm tungsten bead sinks close to the rate of a bulkier fly on a 2.8mm brass bead, without the bulk.

Slotted vs countersunk and jig hooks

A countersunk bead has a cone-shaped recess on one face so it seats against the bend of a straight-shank hook, nose to eye. A slotted bead has a full slot cut through one side, wide enough to slide sideways over the bend of a jig hook where the shank kicks up toward the eye. That is the only way to get a bead onto a jig shank at all. A round or countersunk bead of the same diameter will not clear the bend on most 60 or 90 degree jig hooks; it either will not pass at all or seats crooked.

The slot also changes the math on weight. Removing a slot takes out less metal than removing a cone-shaped countersink, so a slotted bead keeps more mass than a countersunk bead of the same outside diameter, per Wapsi's own comparison. The failure mode runs both directions: a slot cut too narrow will not slide over the hook's bend, and a slot cut too wide lets the bead wobble and ride off-plumb on a hook meant to fish point-up. Firehole's own note: slot size matters more than diameter, because a slotted bead clears a jig hook that a round bead of the same diameter never will.

Bead size to hook size

Bead diameter and hook size are matched by eye-to-gap fit, not by a fixed formula, but the pairings below hold across the four lines reviewed here and bracket the sizes already in use on this site's pattern pages. Those pages sit at the heavy end of each range on purpose, because a jig nymph is built to sink: the Frenchie page calls for a 2.8mm bead on a size 16 to 18 hook and 3.2mm on a 12 to 14, the Walt's Worm page a 3.0mm to 3.2mm bead on a 12, and the Perdigon page 2.8mm to 3.5mm across its size range. Drop one step in the table for a slower sink or a size 18 fished in a shallow riffle.

Hook size Typical bead size
18 2.0mm to 2.4mm (2.8mm for a fast sink)
16 2.4mm to 2.8mm
14 2.8mm to 3.3mm
12 3.0mm to 3.5mm
10 3.5mm to 4.0mm

Undersized, the bead spins loosely at the eye and adds little sink rate for its bulk. Oversized, it will not clear the hook eye or crowds the point enough that hook-ups suffer. The Euro nymphing guide recommends 3.5mm to 4.0mm specifically for fast or deep runs, the heavy end of this table, not the default.

Finish and color

Gold and copper reflect ambient light and read as a highlight in stained water, most of what a Frenchie's bead is doing before the hot-spot collar goes on behind it. Silver and black nickel run duller, useful on ultra-clear tailwaters where flash draws refusals instead of strikes. Fluorescent finishes (chartreuse, hot pink, hot orange) work as a trigger point the same way a Frenchie's Ice Dub collar does: a bright contrast spot that pulls a fish's eye to the fly rather than a match to any food item. None of the four brands publishes a strike-rate difference between finishes; the pattern pages on this site treat color as a water-clarity and confidence call, not measured performance.

Pack count and price per bead

Pack size varies enough between brands that sticker price alone is misleading. Wapsi runs $3.25 per 10-pack at 2.0mm (about $0.33 a bead) up to $6.95 per 10-pack at 4.8mm (about $0.70 a bead). Firehole holds a flat $8.95 per pack regardless of size, about $0.37 a bead at the 24-count sizes and closer to $0.75 a bead once the pack drops to 12 at 4.5mm. Hareline's verified gold beads run about $0.72 a bead at 3.2mm and $1.14 a bead at 3.8mm. Umpqua's $8.99 to $24.99 range, depending on size, color, and 10 or 20-count pack, lands between $0.90 and $1.25 a bead. Wapsi and Firehole are the two worth stocking in bulk; Hareline and Umpqua earn their higher per-bead cost through color range and named hook fit.

Firehole Outdoors Slotted Tungsten Stones: the top pick

Specs:

  • Pack: 24 beads per pack (18-count at 4.0mm, 12-count at 4.5mm)
  • Material: 95% tungsten alloy (tungsten, nickel, iron)
  • Density: about 18 g/cm3, roughly 1.6 times the density of lead, per Firehole's own published figure
  • Sizes: 1.5mm to 4.5mm
  • Slot: precision cut for 60 and 90 degree jig hooks
  • Colors: 23 standard finishes, plus 4 plated or raw options at 1.5mm only
  • Price: $8.95 per pack as of September 2026

Firehole is the only brand in this roundup that shows its work. The product page states the alloy percentage, the resulting density, and the weight spread between purity and diameter, the kind of number that lets a tyer decide whether alloy grade or bead size changes sink rate more. The size run, 1.5mm to 4.5mm in half-millimeter steps, covers a size 20 midge jig through a size 4 stonefly point fly without changing brands.

The limit shows up at the top of the range: 4.5mm caps out around a size 4 hook, per Firehole's own note, so bigger streamers need a different bead. Pack count also shrinks as size goes up, 24 beads at the small end down to 12 at 4.5mm, so the flat $8.95 buys fewer beads at the largest sizes.

Buy if: You want one line that covers 2.0mm to 4.0mm hook-size pairings (and beyond) with published density numbers behind it.

Skip if: You tie almost exclusively at 4.5mm and up, where the per-bead cost rises and the pack shrinks to 12.

Wapsi Tungsten Slot Beads: the value pick

Specs:

  • Pack: 10 beads per pack
  • Sizes: 2.0mm, 2.4mm, 2.8mm, 3.2mm, 4.0mm, 4.8mm (6 sizes, listed in inch fractions on Wapsi's own site)
  • Colors: 12, including 4 fluorescent finishes
  • Weight: per Wapsi's own spec, twice as heavy as brass and heavier than a countersunk bead of the same size
  • Price: $3.25 to $4.95 per pack for most colors, up to $6.95 for black nickel and copper at 4.8mm, as of September 2026
  • Availability: fly shops only; Wapsi does not sell directly to the public

Wapsi's own spec sheet makes the plainest case for why a slot beats a countersink on weight: a slot removes less metal than a cone-shaped countersink, so the bead keeps more mass at the same outside diameter. At $3.25 for a 10-pack of the 2.0mm size, this is the cheapest entry into a slotted bead reviewed here, and the price gap holds through the middle sizes most Eastern nymphs are tied on, 2.8mm and 3.2mm run $3.55 to $4.35 per 10-pack.

The limit is color and size spread. Six sizes and 12 colors is the smallest catalog of the four, with no size between 4.0mm and 4.8mm. A tyer chasing an exact shade match across a whole fly box will run out of Wapsi options before running out of budget.

Buy if: You tie in volume and want the lowest cost per bead in the common 2.8mm to 3.2mm range.

Skip if: You need a specific fluorescent shade or a size between 4.0mm and 4.8mm; Wapsi does not carry either.

Hareline Tungsten Slotted Beads: the deepest color run

Specs:

  • Pack: 20 beads per pack (most colors)
  • Sizes verified: 1/8 inch, listed as 3.3mm on Hareline's own site and sold here as the 3.2mm affiliate link, and 5/32 inch, listed as 3.8mm; the full line runs 1.5mm to 5.5mm across 8 sizes
  • Colors: roughly 26 per size, from standard gold, copper, and silver to 6 fluorescent shades and several mottled and anodized finishes
  • Price: $14.34 per 20-pack at 3.2mm (gold), $22.74 per 20-pack at 3.8mm (gold), both as of September 2026
  • Slot: cut for jig-style hooks; a handful of specialty colors ship in smaller counts than the standard 20

Hareline's slotted line is the one this site already links to for the Hareline Tungsten Slotted Bead 3.2mm and Hareline Tungsten Slotted Bead 3.8mm sizes used across the Perdigon, Frenchie, and Walt's Worm pattern pages. The color count is the real selling point: about 26 shades per size gives a tyer matching a hatch or building a hot-spot variant more raw material than any other brand here, without switching vendors.

The limit is price per bead. At $14.34 for 20 beads, the 3.2mm size runs about $0.72 a bead, roughly double Wapsi's cost at a comparable size, and 3.8mm runs closer to $1.14 a bead. That premium buys color, not more tungsten; Hareline does not publish an alloy percentage or density figure the way Firehole does.

Buy if: You want the widest color selection at a size that is already stocked on this site, and you tie enough different patterns to use that range.

Skip if: Price per bead matters more than color count; Wapsi or Firehole cost less for the same size.

Where to buy: Hareline Tungsten Slotted Bead 3.2mm

Umpqua Tungsten Slotted Beads: matched to a named jig hook

Specs:

  • Sizes: 10, from 1.5mm to 5.5mm (1.5, 2.0, 2.3, 2.4, 2.8, 3.0, 3.3, 3.8, 4.6, 5.5mm)
  • Colors: 13, including gold, black, silver, copper, rose gold, black nickel, printed white, and 5 painted hot colors
  • Pack: 10 or 20 count
  • Price: $8.99 to $24.99 depending on size, color, and pack count, as of September 2026
  • Fit: sized to the Umpqua Competition Series C400 Jig Hook and Tiemco jig hooks, per Umpqua's own product page

Umpqua's page makes a narrower, more useful claim than most bead listings: this bead is sized to a specific jig hook the company also sells, the Competition Series C400, plus the widely stocked Tiemco jig hooks. For a tyer already standardized on one of those two hooks, that removes the guesswork of matching slot width to shank bend across two unrelated brands.

The limit is price spread. The listing runs $8.99 to $24.99 depending on size and pack count, without breaking out which sizes land at which end short of stepping through the ordering grid one size at a time. Ten sizes and 13 colors is a mid-sized catalog, ahead of Wapsi and behind Hareline.

Buy if: You already tie on Umpqua's C400 or Tiemco jig hooks and want a bead sized specifically for that shank.

Skip if: You tie on Hanak or Firehole hooks; the fit claim on Umpqua's page is specific to its own hook and Tiemco's, not a universal guarantee.

Which one to buy

Start with the hooks already in your box. A slotted bead only earns its price if the slot clears the hook's bend cleanly, and that is a function of the hook brand as much as the bead brand. A Hanak H400 BL Jig Hook and an Umpqua C400 do not bend identically at the same nominal gap, so a bead that seats perfectly on one can ride loose on the other. Tying mostly on Umpqua or Tiemco jig hooks, Umpqua's own bead removes that guesswork. Everyone else chooses among the other three on price, color, and size range.

For most tyers that choice comes down to volume. A dozen Perdigons and Frenchies a week for your own box gets more value from Wapsi's lower per-bead cost than from color shades that never leave the box before the fly is retired to a rock on the Gunpowder. Tying for a shop, a guide trip, or a wider pattern rotation gets more use out of Hareline's 26-shade run per size, since more colors means fewer trips to a second vendor mid-season.

For the typical reader of this site, a Mid-Atlantic trout angler tying two hundred flies a year for Perdigons, Frenchies, and Walt's Worms across the Gunpowder, the Savage, and the North Branch, I would buy Firehole Outdoors' Slotted Tungsten Stones. The published density figure and the half-millimeter size steps from 1.5mm to 4.5mm cover this article's 2.0mm to 4.0mm hook-size table, the flat $8.95 price is easy to plan a bench order around, and the slot spec (cut for both 60 and 90 degree jig hooks) removes the single biggest failure mode in this category: a bead that will not seat.

Questions people ask

What size tungsten bead do I need for a size 14 nymph?

Something in the 2.8mm to 3.2mm range seats cleanly on most size 14 jig hooks without crowding the eye. Step up toward 3.2mm for faster or deeper water, and down toward 2.8mm for a slower pool where you want the fly to hang in the column longer.

Should I buy slotted or countersunk tungsten beads?

Slotted, for any jig-style hook (the bent-shank hooks behind Perdigons, Frenchies, and modern Walt's Worms). Countersunk beads are for straight-shank nymph hooks and will not clear a jig hook's bend. The two are not interchangeable.

What color tungsten bead works best for trout?

Gold and copper for stained or moderately clear water, where the flash reads as a highlight. Silver or black nickel for gin-clear tailwaters where flash draws refusals. Fluorescent colors work as an attractor trigger, the same role a Frenchie's hot-spot collar plays, more than as a match to any specific food source.

How many tungsten beads come in a standard pack?

It varies by brand: Wapsi and most retailer-sold options run 10 per pack, Hareline runs 20 for most colors, and Firehole runs 24 at the small and mid sizes, dropping to 18 or 12 at its largest sizes. Check the pack count before comparing sticker prices between brands.

Updated October 16, 2026.