ITEM NAME:Boat Thru Hull Fitting/Drain 3/4 inch Hose Barb Marine 316 Stainless Steel Description: Boat Thru Hull Fitting made of 316 Stainless Steel for durable use and long time services Carefully Polished to a beautiful, mirror-like finish Maximum corrosion resistance and durability in the saltwater environment. Thru-Hull Connections: excellent corrosion resistance to UV & weather-aging Straight Thru Hull Fittings are for use with hose, and are available in four sizes: Size 1: Overall Length: 3 inch (75mm) Mounting Hole Diameter: 3/4 inch (26.5mm) Size 2: Overall Length: 3 inch (75mm) Mounting Hole Diameter: 1 inch (33.4mm) Size3: Overall Length: 3-1/2 inch (85mm) Mounting Hole Diameter: 1-1/4 inch (42mm) Size 4: Overall Length: 3-1/2 inch (86mm) Mounting Hole Diameter: 1-1/2 inch (47.7mm) Specification: Color: Silver Material:316 Stainless Steel Package Includes: 1x Boat Thru Hull Fitting 6x Bolt Screws 5x Nuts.Straight Thru Hull Fittings are for use with hose, and are available in four sizes 1x Boat Thru Hull Fitting. Material:316 Stainless Steel. Color: Silver.