Danco Sink Strainer Washer 4-1/4 " Od. X 3-3/8 " Id. X 1/8 " T Rubber Trade Size 4 " For Basket Stra 4" trade size 4-1/4"OD x 3-3/8"ID x 1/8" thick For basket strainers and drum trap covers Synthetic black rubber Polybag/10