Features: 1.Application: Fit for 22mm inner diameter hose pipe; Fit for Webasto, for Planar, for Eberspacher, Chinese Diesel Parking heaters var4. 2.Function: Thru hull skin can increase the gap between pipes, which can play the role of heat insulation and prevent damage to the hull and vehicles. 3.High Strength: Thru hull exhaust skin is made of marine grade 316 stainless steel, rustproof, chemical resistant, suitable for marine enviroment. 4.Long Lifespan: Elaborate manufacturing, diesel heater thru hull skin is surface polished to improve the durability in the saltwater environment. 5.Easy Installation: Comes with screws, nuts, rubber gasket and stainless steel gasket, simple to use, no complicated operations, will not take you long time. Specification: Item Type: Thru Hull Exhaust Skin Material: 316 Stainless Steel Function: Increase the gap between pipes, which can play the role of heat insulation and prevent damage to the hull and vehicles. Compatible with: Fit for 22mm inner diameter hose pipe. Fit for Webasto, for Planar, for Eberspacher, Chinese Diesel Parking heaters var4.