Danco, Inc. 88209 Universal Design Tub Drain Cartridge Gasket, for Use with Tip-Toe Style Bathtub Stoppers, Rubber, Black Rubber construction provides durability Use for tub drain assemblies Provides a positive seal in a drain For tip-toe style bathtub stoppers 2-1/16 in. x 1 in. x 1/4 in.