Cork Rubber Washer - 3/8" ID x 3/4" OD x 1/16" Thick (10 Pcs Per Pack)
Amazon.com: Black Rubber Washer Large Rubber Washers 1" OD x 3/8" ID x 1/8" Thickness - EPDM Rubber Washers Flat Rubber Washers Round Rubber Washers (Pack of 25) : Industrial & Scientific
3/4 x 3/8" Cone Washers
Master Plumber 1-3/8-Inch I.D. x 2-Inch O.D. Tube Rubber Lavatory Drain Washer | Killingworth True Value