17.5mm x 3.0mm with a 9.5mm hole.
FA-99 Top Cap Felt Washer Felt Washer 17.5mm x 2.5mm & 11.1mm hole
FA-88 Top Cap Felt washer for Cornets - Set of 3
FA-90 Top Cap Felt Washer 19mm x 3.2mm with an 11.1mm hole- Set of 4
Trumpet Repair Kit for Brass Instrument Valve Cap Felt Washer Connecting Rod
20Pcs Yootones Trumpet Valve Felt Washers Cushion Trumpet Top Cap Felt Pads for Trumpet Replacement Musical Instrument Accessory (Black)
20Pcs Yootones Trumpet Valve Felt Washers Cushion Trumpet Top Cap Felt Pads Compatible with Trumpet Replacement Musical Instrument Accessory (White)
