Perko 1-1/4" Thru-Hull Fitting w/ Pipe Thread BronzeFlange is machined to fit hull and grooved to retain bedding compound. Neckis threaded to approximately 3/8 inch from flange.Cast bronze.Technical Information:Pipe Size Inches: 1-1/4Mouting Hole Diamete Inches: 1-5/8Maximum Hull Thickness Inches: 2O.D. Flange Inches: 2-3/4Model Number: 0322DP7PLBShip Weight: 6.0/29.4 lbs.MADE IN THE USA