Made of thermoplastic elastomer (TPE), U-shaped spring steel embedded inside, hard and without deformation, waterproof. Total length 5m, which is enough to cover all edges of 4 doors. Suitable for all sedans and SUVs. But it is not suitable for edge thickness more than 5mm or less than 3mm. The trim strip is very soft and can be cut freely. The trim strip is 2mm thick and 8mm deep. Before purchasing, make sure your car has enough space to install it. The U-shaped spring of the trim steel can be firmly clamped to the doors without hitting. It will not fall off when washing the car with a high-pressure washer. And leaves no marks when disassembling. Perfect for protecting the edge of the car door when opening in the garage or in a tight parking space. Instructions: Remove a piece of steel from the trim strip, making the top of the trim strip easily attach to an uneven corner. Make sure the door is clean before installation. Start from the top and insert the trim strip around the edge of the door until it fits snugly. Use tools to gently tap the strip, so that it fits completely tightly against the door. Usage: Metal edge of the main body between the door and the vehicle body. In the door of the car and more from the outer edge. In the window above the car. Trunk lid. Hood. Quantity delivered: 1 piece