Applicability: Suitable for most air parking heaters such as Webasto and Eberspek. Size: Inner diameter 71mm/2.79", outer diameter 75mm / 2.95", size: 102x98x75mm/4.02"x3.86"x2.95"(L*W*H), please confirm it is right for you before purchase. Easy Installation: No need to drill or cut, install directly, the process only takes a few seconds. Excellent Material: Made of high-quality nylon plastics with flame-retardant materials, high temperature resistance, no odor, L shape elbow durability. Package Includes: 1 x 75mm/3inch diesel air heater duct connector.