Dixon® Gasket, Type B, 4 in Nominal Size, 5-5/16 in Inside dia, 6-1/2 in Outside dia, 19/32 in Thickness, Rubber, Domestic Dixon® RG3054 Type B Gasket, 4 in Nominal, 5-5/16 in ID x 6-1/2 in OD x 19/32 in Thick, Rubber, Domestic