Whitecap Nylon Straight Thru-Hull Fitting w/ BarbWhitecap Nylon Thru-Hull Fittings are constructed of high quality nylon and 316 stainless steel. These thru-hulls include a barb. Whitecap Thru-Hulls are available in a wide range of sizes. See specifications below.Specifications: Part # Hose Size Flange O.D. Thread Length Barb Length Overall Length Cut-Out Max Hull Thickness S-3801 3/4" 1-7/8" 1-1/2" 1" 3-1/8" 1-1/4" 1" S-3802 1" 1-7/8" 1-9/16" 1-13/16" 3-1/8" 1-3/8" 1-1/4" S-3803 1-1/8" 2-3/8" 1-5/8" 1-7/8" 3-1/8" 1-1/4" 1-1/4" S-3804 1-1/4" 2-3/8" 1-5/8" 1-1/2" 3-3/4" 1-5/8" 1-1/4" S-3085 1-1/2" 1-7/8" 1-5/8" 1-5/8" 3-3/4" 1-1/2" 1-1/4"