Specification:Color:Black Heater Pipe Inner Dia:60mm/2.36";Heater Pipe Max Length:80cm/31.5";Air Vent Outlet Outer Dia:60mm/2.36";Air Vent Outlet Size:87x73mm/3.43"x2.87"(W*H) Material:Aluminum Foil Product Characteristics:① Car Air Heater Ducting Pipe Kit is used to connect heating components and transport warm air to vehicles,provides warmth for the driver and passengers in cold weather.In addition, effectively prevents fogging inside the car, speeds up engine warm-up and improves fuel using efficiency.② Warm Air Ducting Hose Kit is made of Aluminum Foil, high temperature resistance and corrosion resistance.Easy / Professional Installation:Requires professional installation, it is recommended to find professionals and auto repair shops to install.Package List:Package Included:1 Set Car Heater Duct Kit(1 Pc Heater Pipe, 1 Pc Air Vent Outlet Cover, 2 Pcs Clamp) Note:Because the material of the tube can be adjusted, different measurement methods will cause an error of 1-2cm. It is recommended to buy a longer length.Please allow 1-3mm different of other warm air hose parts due to manual measurement.