11/16" OD. 050" thick, no center hole. PPC part #782. I'm Howard Gustafson and I've been a player piano technician since 1985.
100 Player Piano Valve Discs 3/4" OD, 9/64” ID, .030" Thick, Steel
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Set of 100 Cork Gaskets for Ampico B Player Piano Valve Blocks
Set of 100 Leather Gaskets for Ampico B Player Piano Valve Blocks
