Perko 1-1/2" Thru-Hull Connection f/ use with Hose BronzeFlange is machined to fit and grooved to retain bedding compound neck isthreaded to approximately 3/16 inch from flange.Cast bronze, plain or chromed brassRegular or short length versonsRegular Length- Fits maximum hull thickness up to 2 inchesShort Length- For thin hull sections up to 5/8 inches maximumRegular Length - Plain Bronze Technical Information:Hose Size Inches: 1-1/2Mounting Hole Diameter Inches: 1-7/8Maximum Hull Thickness Inches: 1-7/8O.D. Flange Inches: 3-1/8Model Number: 0350008DPPShip Weight: 8.3/15.9 lbs.Made in the USA