This is a Vinyl 5/8 Washer which is suitable for Keg Couplers and Tap Shanks
Specifications:
(10 Pack) 5/8 Vinyl Washer 13mmIDx20mmODx3.7mm

(10 PACK) 5/8 Vinyl Washers for Keg Coupler and Tap Shank
Specifications:
(10 Pack) 5/8 Vinyl Washer 13mmIDx20mmODx3.7mm