It looks like you’re referring to a cork fighting butt for a fly rod. Here’s what you might be looking for:

Fly Rod Fighting Butt (Cork)
A fighting butt is an extension at the end of a fly rod’s handle, typically made of cork, that provides extra leverage when fighting larger fish. It helps distribute pressure and improves grip during extended battles.

AAAA CORK  FLY ROD FIGHTING BUTT

Key Features:
– Material: High-quality cork (durable, lightweight, and comfortable)
– Function: Adds balance and leverage for fighting strong fish
– Compatibility: Often found on heavier fly rods (e.g., saltwater, salmon, or steelhead rods)
– Installation: Some are removable/replaceable; others are built into the rod handle

Common Uses:
– Saltwater fly fishing (tarpon, bonefish, etc.)
– Big freshwater species (steelhead, salmon, large trout)
– Spey or switch rods (for two-handed casting)

If you’re looking to buy, replace, or customize a cork fighting butt, options include:
– Pre-made cork fighting butts (from brands like Ross, Orvis, Sage)
– DIY cork grips (available from rod-building suppliers like Mudhole, Jann鈥檚 Netcraft)
– Custom rod builders (for tailored solutions)

Would you like recommendations for specific brands or installation tips? Let me know how I can help! 馃帲