Yamaha OEM 3 or 4 Valve Tuba, Sousaphone, & others, Felt, Pad, & Cork Kit, 1 kit.
4 Valve Tuba (post 1987 YBB-321) , Felt & Cork Kit, 1 kit. See my item ID# 16829 for a pre-1987 felt & cork kit.
See my item ID# 16399 (4 valve) or 16031 (3 valve) for a complete kit with Springs & Guides.