ITEM NAME:Nylon+Stainless Steel Boat Black Marine Nylon Thru Hull Fitting 1-1/2" Description: Made of nylon material, resistance to UV & weather-aging, durability, corrosion resistance. Uses include scupper, sink drain, and bilge pump outboard discharge. Their construction is designed to resist degradation as a result of chemical and saltwater exposure. Installation is simple and worked perfectly. Fiting for installation through the transom or as an exhaust port for a bilge pump. Specification: Material:Nylon+Stainless Steel Size:102x65x65mm/4.02x2.56x2.56inch Color:Black+Silver Hose Size: 2.36inch Mounting Hole Diameter: 1-1/2 inch Package Includes: 1 Piece Thru Hull Note: Please not recommended for use below the waterline. Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand,Thank you..1 Piece Thru Hull. Material:Nylon+Stainless Steel. Made of nylon material, resistance to UV & weather-aging, durability, corrosion resistance. Color:Black+Silver. Installation is simple and worked perfectly.