Specification : Condition: 100% Brand new Model number: G14546 Product name : heater duct Material: Aluminum foil Color: black Diameter: 42mm/1.65in Before stretching: 100cm/39.37in After stretching: 200cm/78.74in Application : for Air Diesel Heater 5000W 4 HolesAir paking heater/Car/Truck/Boat/Heavy machine /Agricultural machinery/industrial machinery etc. Features : 1Anti-shock, corrosion flame resistant. 2Mainly used for 2KW diesel air heaters. 3Hot cold, air ducting for diesel heater For Webasto, For Eberspacher,For Domestic, For Planer etc. 4Suitable for any 42mm outlet hose. 5Length is cm is extendable to 200cm. Note: 1We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need. 2Please allow 0.5-1 inch difference due to manual measurement.(1inch=2.54cm) 3The color of the actual items may slightly different from the listing images due to different computer screen, thanks for your understanding. 4There are no instruction included Professional Installation is highly recommended.If you want to know how to install it,please contact us by Email Package included : 1*heater duct