Perko 1-1/2" Thru-Hull Fitting f/ Hose Chrome Plated Bronze Made in the USA [0350008DPC]Perko 1 1 2" Thru Hull Connection f use with Hose Chrome Plated 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 versions Regular Length Fits maximum hull thickness up to 2 inches Short Length For thin hull sections up to 5 8 inches maximum Technical Information Regular Length Chrome Plated Bronze: Hose Size