Bach, Conn, & King Euphonium Tune-Up Kit, 3 or 4 valve. Fits 3 valve Bach B1103 & King 628, or 4 valve Bach B1110, Conn 19I, & King 2280. Genuine Conn-Selmer parts, not for marching Euphoniums, contact me if you have any questions. Contains finger button & stem felts, top cap felts, springs, & water key corks. For valve guides, see my item ID#s 16185 (3 each nylon), 16287 (4 each nylon), & 16205 (3 ea brass).