Perko 1-1/4" Thru-Hull Connection f/ use with Hose Chrome PlatedBronzeFlange 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 versionsRegular Length- Fits maximum hull thickness up to 2 inchesShort Length- For thin hull sections up to 5/8 inches maximumTechnical Information Regular Length - Chrome Plated Bronze:Hose Size Inches: 1-1/4"Mounting Hole Diameter Inches: 1-5/8"Maximum Hull Thickness Inches: 1-7/8"O.D. Flange Inches: 2-3/4"Model Number: 0350007DPCShip Weight: 6.7/12.9 lbs.Made in the USA