Perko 1-1/8 Thru-Hull Connection f/ use with Hose 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 Plain 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 035006ADPP. Ship Weight 4.7/9.0 lbs. Made in the USA Flange is machined to fit and grooved to retain bedding compound neck is threaded to approximately 3 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 Plain Bronze Technic 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 035006ADPP