Features: 1.Dimensions: The outer diameter of the fitting hole is 22mm/0.87in, the inner diameter is 18mm/0.71in, fit for hose, tube or pipe. 2.Durable Material: Made from premium 316 stainless steel, ensures excellent corrosion resistance, making it suitable for yachts, ships in harsh marine environments. 3.Mirror Polishing: The surface of the through hull exhaust fittings is polished to prevent rust and be durable in salty water environments. 4.Versatile Application: Can be used for various exhaust systems and pipes, providing a reliable and efficient solution for yacht, ship, or diesel heater vents. 5.Long Lasting Performance: Robust construction ensures long lasting performance and trouble free operation, ensuring the longevity of your marine equipment. Specification: Item Type: Thru Hull Exhaust Skin Fitting Socket Material: Stainless Steel Outer Diameter: Approx. 22mm/0.87in Inner Diameter: Approx. 18mm/0.71in Application: Suitable for yachts, ship pipeline exhaust vents, diesel heater exhaust ports