ITEM NAME:Durable Black Plastic 1'' Marine Thru-Hull Connector Replacement for Boat Description: It is very suitable for the exhaust port of bilge pump. Thru-hull connectors are a critical link in safe and reliable operation of onboard plumbing systems. Molded plastic with broad flange, sturdy construction for long lifespan. Easy to install and remove, simple to use, not recommended for use below the water line. For 1'' Inner diameter hose. Specification: Material: ABS Hight: 93mm Top Inner Diameter: 26mm Top Outer Diameter: 61mm Bottom Diameter: 33mm, 25.5mm, 18mm Package Includes: 1 Piece Boat Thru-hull Fittings Note: Due to the light and screen difference, the item's color may be slightly different from the pictures. Please allow 1-3mm differences due to manual measurement..1 Piece Boat Thru-hull Fittings. Due to the light and screen difference, the item's color may be slightly different from the pictures. It is very suitable for the exhaust port of bilge pump.