Perko 1-1/2" Thru-Hull Fitting f/ Hose Bronze Made in the USA [0350008DPP]Perko 1 1 2" Thru Hull Connection f use with Hose Bronze Flange is machined to fit and grooved to retain bedding compound neck is threaded to approximately 3 16 inch from flange. Cast bronze, plain or chromed brass Regular or short length versons Regular Length Fits maximum hull thickness up to 2 inches Short Length For thin hull sections up to 5 8 inches maximum Regular Length Plain Bronze Technical Information: Hose Size Inches: 1 1 2 Mounting Hole