Features: 1. Dimensions: The outer diameter of the fitting hole is 24mm/0.94in, the inner diameter is 20mm/0.79in, fit for hose, tube or pipe. 2. High Strength Stainless Steel: Thru hull exhaust skin is made of marine grade 316 stainless steel, rustproof, chemical resistant, can deal with harsh environment. 3. Mirror Polished: The surface of the thru hull exhaust fitting has been polished, rust resistance and durability in the saltwater environment. 4. Application: Suitable for Yacht, ship pipe exhaust vent, diesel heater exhaust, fit for Webasto, for Planar, for Eberspacher. 5. Easy Installation: Comes with screws and gasket, thru hull exhaust pipe socket is simple to use, no complicated operations. Specification: Item Type: Thru Hull Exhaust Skin Material: 316 Stainless Steel, Mirror Polished Dimension: The outer diameter of the hole is 24mm/0.94in, the inner diameter is 20mm/0.79in, with black gasket Application: Yacht, ship pipe exhaust vent, diesel heater exhaust, fit for Webasto, for Planar, for Eberspacher Package List: 1 x Thru Hull Exhaust Skin 3 x Gasket 3 x Screw 3 x Nut Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.