GUOXING High-quality marine grade 316 stainless steel, polished surface, strong and tough.cCorrosion resistance, salt water environment resistance, durability, long service life.new through-hull pipe fittings for increased pipe clearance and thermal insulation.Suitable for 24mm inner diameter hose, convenient and fast, easy to install.Fit for Webasto, Planar, Eberspacher,thru hull exhaust fittings are made of 316 stainless steel. 316 stainless steel has stronger anti-rust, abrasion resistance.Complete specifications. We produce straight thru hull exhaust fittings and bend thru hull exhaust fittings, fit for 22mm or 24mm inner diameter hose pipe.High temperature resistance. Thru hull exhaust fittings increase the gap between the pipes, which can play the role of heat insulation, to prevent damage to the hull and vehicles.Fit for 24mm Inner Diameter Hose PipeA very complete solution for all heater systems with 24mm ID exhaust. 24mm outside diameter, fit for 24mm inner diameter hose pipe.Provide Parts for Installation3x bolts3x nutsStainless steel gasket316 Stainless SteelThru Hull/Exhaust Skin Fitting is made of 316 stainless steel. In humid air or high-temperature weather, compared with 304 stainless steel or iron material, 316 stainless steel has stronger anti-rust, abrasion resistance.