It looks like you’re referring to “Pellet Fly Fish Biscuits”—a type of brown fly fishing fly sold in a half-dozen (6) pack, size 4.

Key Details:
– Pattern: “Pellet Fly” or “Fish Biscuit” (likely imitates fish food pellets, common in stocked trout waters)
– Color: Brown (natural pellet shade)
– Size: 4 (fairly large, good for trout feeding on pellets)
– Quantity: 6 flies (half dozen)

Best Uses:
✔ Stocked trout waters (where fish are conditioned to eat pellets)
✔ Stillwaters & ponds (commonly used in fisheries with pellet-fed trout)
✔ Nymphing or under an indicator (fish it like a slow-sinking bait)

Similar Patterns:
– Trout Pellet Fly (usually in tan, brown, or orange)
– Midge Pupa (if fish are keyed in on small food)
– San Juan Worm (another “junk fly” that works in stocked waters)

Would you like recommendations on how to fish these or where to buy them?