Amazon.com: (4 Pack) Neoprene Rubber Washers 3" OD x 2" ID x 1/16" Thickness - 60 Duro Primal23 Industrial Endeavor Series Rubber Washers : Industrial & Scientific
100 Pack) Oil Resistant Neoprene Rubber Washers 1/2" OD x 3/16" ID x 1/16" Thickness - Endeavor Series Sealing Rubber Washers: Amazon.com: Industrial & Scientific
Amazon.com: (4 Pack) Thick Neoprene Rubber Washers 3/4" OD X 3/8" ID X 1/4" Thickness - Primal23 Industrial Neoprene Rubber Spacer… : Industrial & Scientific
SHKIBY [100 Pack] 1/4" x 5/8" EPDM Rubber Washer, Neoprene Flat Washers spacers, 16.5mm OD 6.5mm ID 3mm Thickness for Faucet Pipe Water Hose & Bolts etc: Amazon.com: Industrial & Scientific