Perko Spare O-RingsThese O-Rings are designed as replacements for use with Perko 1-1/2" deck plates. These replacement O-Rings come in pairs of 2. 1613 - Polymer Gas Fill for 1-1/2" Hose; 0527 - Gas Fill for 1-1/2" Hose; 1270 - Fuel & Water Fills for 1-1/2" Hose; 0528 - Fuel, Water and Unmarked Fills for Pipe; 0507 - Waste Deck Plate for Hose; 1269 - Waste Deck Plate for Hose; 0524 - Waste Deck Plate for Pipe;