Perko Plug-In Type Base 2 PinMade from polished stainless steel and black polymer. Features a waterproof Snap-On cover and pigtail leads.Fits Figs. 1343, 1347, 1348, 1349, 1400, 1440, 1442, 1444, 1450, 1451, 1452, 1460, 1454, 1470 Series All-Round Pole Lights 1612 and 1616 Series Bi-Color Pole LightsSpecifications: Base dimensions: 2-1/4" O.D.; Role Rake: 0; Screw Size #8; Click here for Perko Plug-In Type Base 2 Pin installation instructions.