in 1 Air Duct Hose Kit 12ft, Suitable for Semi-trailer and Tractor Truck. Suitable for: General purpose. Features & Specifications: 100% Brand New. High quality. Comfortable to use. Manufactured with precision. Manufactured to strict quality control standards. Easy to install and maintain, guaranteed. Package Contents: 3 in 1 Air Duct Hose Kit 12ft, 2*Connectors, 4*Handles, 12*Washers, 1 Roll of Sealing Tape. Please refer to the pictures for more details. Installation instruction is not included.