Material: high-quality PVC with heat resistant -40-140? Dimension:3’’width16.1 Feet (101.41 feet straight ducts+12 feet flexible ducts) Easy to install 1. Drill the frame to the outside wall where the line set comes out from the indoor unit and connects to the outdoor unit. 2. Screw the frame to the outside wall, and then use the provided zip ties to secure the line set to the frame. 3. Secure the top into place, and then snap on all the other pieces simply. You can also use elbow piece to install at an angle. Package includes: 10 x 1.41 ft straight ducts 1 x 2 ft flexible duct 1 x wall cover 1 x 90° wall cover 1 x 90° Flat Elbow 1 x End Cap 1 x 90° Elbow 9 x Coupling