Perko 1-1/4 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 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 0350007DPC. Ship Weight 6.7/12.9 lbs. Made in the USA 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 Hose Size Inches 1-1/4 Mounting Hole Diameter Inches 1-5/8 Maximum Hull Thickness Inches 1-7/8