Part Number: 9.803-536.0 Cross Reference Part Number(s): 2-011573, 817313, 98035360 This 9.803-536.0 Red GASOLINE Cap with gauge is used on portable, gasoline-powered hot water pressure washers. 14 inches in length, this gasoline fuel gauge is compatible with many gasoline supply tanks however we cannot guarantee the accuracy of the fuel gauge, due to depth of tank. The RED cap indicates gasoline, while a BLACK cap indicates diesel fuel.