DECK PLATES FOR PIPE are cast bronze. Chrome plated. Comes complete with key, O-ring and retaining cable on cap. The 1-1/4" and 1-1/2" caps have s slot between holes. Screw size is 8. Ues spare key series 1248 and spare O-ring series 513. Type is Diesel. Pipe size is 1-1/2". Flange size is 3-5/8".