Perko 1-1/4 Thru-Hull Fitting w/ Pipe Thread Bronze. Flange is machined to fit hull and grooved to retain bedding compound. Neck. is threaded to approximately 3/8 inch from flange. Cast bronze. Technical Information Pipe Size Inches 1-1/4. Mouting Hole Diamete Inches 1-5/8. Maximum Hull Thickness Inches 2. O.D. Flange Inches 2-3/4. Model Number 0322DP7PLB. Ship Weight 6.0/29.4 lbs. MADE IN THE USA Flange is machined to fit hull and grooved to retain bedding compound. Neck. is threaded to approxi Cast bronze. Technical Information Pipe Size Inches 1-1/4. Mouting Hole Diamete Inches 1-5/8 Maximum Hull Thickness Inches 2. O.D. Flange Inches 2-3/4 Model Number 0322DP7PLB Ship Weight 6.0/29.4 lbs. MADE IN THE USA