Perko 5/8″ Thru-Hull Fitting f/ Hose Plastic, Molded White Plastic, Broad Flange, Technical Information: Hose Size Inches: 5/8, Mounting Hole Diameter Inches: 13/16, Maximum Hull Thickness Inches: 1-1/4, O.D. Flange Inches: 1-1/2, Model Number: 0328DP4A, Ship Weight: 1.0/6.1 lbs.,