Genuine, Bach, Conn, & King, finger button & valve stem felts.
Common 9/16 x 3/16 x 3/32 (.094), also used as King finger button felts.
Thin felts are 9/16 x 3/16 x 1/16 (.062), and are typically used on Bach TR300 & FH200 horns.
Thick felts are 9/16 x 3/16 x 5/32 (.156), used on many Conn & King tubas, low brass, etc.
Contact us if you wish to verify your horns fit.