Amarine-made Stainless Steel 316 Barbed Boat Thru Hull Fitting 1.75" For 1-3/4" Hose Barb Polished head solid cast stainless steel 316 1 3/4" hose barb 3-1/8 overall length 1 3/4" max hull thickness Mounts in a 1 7/8" hole Flange diameter: 2 3/4"