【STAINLESS STEEL MATERIAL】stainless steel material, good pressure resistance, strong heat resistance, exposed to outdoor rust, durable. Stainless Steel Stove Pipe Reducer is used to connect an appliance to either a chimney liner, stack or twin wall flue system. It can also be used to reline existing masonry chimneys. 【REDUCING PIPE ACTION】Exhaust pipe reducer for you to solve the problem of smoke pipe connection. For example, the smoke exhaust pipe is large, the hole in the wall is small, and the pipe can not be connected; The diameter of the exhaust pipe is large, and the diameter of the smoke pipe of the water heater is small, which cannot be butt mounted. 【APPLICATION】Stainless Steel Stove Pipe Reducer is used to connect an appliance to either a chimney liner, stack or twin wall flue system. It can also be used to reline existing masonry chimneys. Standard interface size, can be connected with stainless steel pipe and aluminum pipe. 【SIZE DESCRIPTION OF REDUCER JOINT】reducer joint can be large and small, or small and large. The size of the big head refers to the inner diameter, and the size of the small head refers to the outer diameter. If you have any questions, please do not hesitate to contact us. Thank you for coming, wish you a happy life！, Manufacturer: RybdaFDc