The thru hull exhaust skin is made of marine grade 316 stainless steel and has good corrosion resistance in salt water and harsh environments. High quality materials and sturdy structural design,with a polished surface treatment process,are aesthetically pleasing and durable. The new design makes thru hull exhaust skin more heat-resistant and allows for faster heat dissipation,increases the gap between pipe,and eliminates the smell of diesel in the car,better protecting your car and boat. Suitable for hoses with an inner diameter of 24mm/0.94".This product is also suitable for Chinese diesel parking heaters. The product is equipped with washers,screws and nuts,which is very simple to install,and four hose clamps are also provided for easy use,you can also watch videos with detailed usage methods. Made by LEQMG,trustworthy.