3/4" ID Large Thick Rubber Washers 1 1/2" OD 3/16" Thick Various Package Sizes | eBay
Black Rubber Washer Large Rubber Washers 1 1/2" OD x 3/4" ID x 3/16" Thickness - NBR Rubber Washers Flat Rubber Washers Round Rubber Washers (10): Amazon.com: Industrial & Scientific
Midwest Fastener® 3/4" Rubber Flat Washers at Menards®