Yamaha OEM 3 valve Tuba & Sousaphone YBB & YSH after 1987, valve tune-up kit. 3 each guides, springs, valve stem felts & pads, top cap felts & pads, valve guide washers & 2 each water key corks.
Yamaha OEM 4 valve Tuba, such as the post-1987 YEB-321 & YBB-321 after 1987. 4 each guides, springs, valve stem felts & pads, top cap felts & pads, valve guide washers & 2 each water key corks. If in doubt or you have a pre-1987 YBB-321, contact me.
