Bach, Conn, King, Baritone, Euphonium, Sousaphone, & Tuba.  Thicker than a common stem felt - 9/16 x 3/16 x 5/32 (.156) felts, set of 3, email me if you need a set of 4.

52J         Conn Tuba 4 valve

B1104S King Baritone 3 valve

B1104 King Baritone 3 valve

14K         Conn Sousaphone 3 valve

2266SP King Baritone 4 valve

20KSB Conn Sousaphone 3 valve

20KSP Conn Sousaphone 3 valve

2370 King Sousaphone 3 valve

B1114 Bach Baritone 3 valve

2341 King Tuba 4 valve

2360 King Sousaphone 3 valve

1140M King Marching Tuba 3 valve

2341        (Old Detachable Bell Version) King Tuba 4 valve

2341SP King Tuba 4 valve

B1111 King Sousaphone 3 valve

12J         Conn Tuba 3 valve

12JSP Conn Tuba 3 valve

627         King Baritone 3 valve

2350        Valve Section Lacquer King Sousaphone 3 valve

625         King Baritone 3 valve

623         King Euphonium 3 valve