Everbilt 5/8 in. x 2 in. Black Neoprene Washer 815888 - The Home Depot
1/4" x 5/8" OD, EPDM Rubber Washers, (100 Pack) Neoprene, 3/32" Thickness - Choose Size, by Bolt Dropper, Neoprene Washers : Amazon.ca: Tools & Home Improvement
5/8" EPDM Rubber Water Meter Gasket, 1/8" Thick, for 5/8" x 1/2" meter – Utility Technologies
China 1/32" 1/16" 1/8" 5/8" flat tap washer silicone rubber washers for plumbing clear rubber washers rubber metal washer factory and manufacturers | Anconn