13/16" OD, 3/32" thick, no center hole. I'm Howard Gustafson and I've been a player piano technician since 1985.
10 Player Piano Synthetic Discs 1/64" under 1-1/4" OD, 1/32" Thick, Circles
10 Gulbransen Player Piano Synthetic Outer Valve Seats/Caps/Covers
Set of 100 Gulbransen Player Piano Synthetic Outer Valve Seats/Caps/Covers
10 Player Piano Hard Fiber Valve Discs, 3/4" OD, 0.052" ID
10 Player Piano Valve Discs 3/4" OD, 0.157” ID, .045" Thick, Stainless Steel
10 Player Piano Phenolic Valve Discs 3/4" OD, 0.055” ID, Tan, Circles
