All T-H Marine Thru-Hull Fittings are made of the highest quality virgin material to insure consistent size, extra durability and attractive appearance. All materials are UV stabilized to provide longevity. T-H Marine has worked with major hose manufacturers to guarantee that our hose barbs have the exact specifications to fit hose securely so that your installations will be trouble free. Hose I.D" Length: 3 3/4"Maximum hull Thickness: 1 1/4"Flange diameter: 2 7/8"Installation hole diameter: 1 7/8" -