Perko 1-1/8 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 versons. Regular Length- Fits maximum hull thickness up to 2 inches. Short Length- For thin hull sections up to 5/8 inches maximum. Regular Length Chrome Plated Bronze Technical Information Hose Size Inches 1-1/8. Mounting Hole Diameter Inches 1-5/16. Maximum Hull Thickness Inches 1-3/4. O.D. Flange Inches 2-1/4. Model Number 035006ADPC. Ship Weight 4.6/8.9 lbs. Made in the USA Flange is machined to fit and grooved to retain bedding compound neck is. threaded to approximately Cast bronze, plain or chromed brass. Regular or short length versons Regular Length- Fits maximum hull thickness up to 2 inches. Short Length- For thin hull sections up Regular Length Chrome Plated Bronze Technical Information . Hose Size Inches 1-1/8 Mounting Hole Diameter Inches 1-5/16 Maximum Hull Thickness Inches 1-3/4 O.D. Flange Inches 2-1/4