Ambient temperature:-20-80 degrees Suitable models:Suitable for vehicle installation with seat headrest steel pipe diameter 10-14mm, Vehicles with fixed headrests cannot be used Product name:car hanger installation method: 1. According to different models and different diameters of steel pipes, select appropriate plastic fixing rings to insert them. With this mounting ring, other vehicles can be placed except the vehicle whose headrest cannot be moved. At the same time, the shelf does not shake and fits better 2. The headrest steel pipe is inserted into the bracket 3. Push the headrest down until it cannot be pushed down, and the installation is complete. The bracket can be put into use normally. Colour:Black Material:Plastic Size:35.5x22x2cm Package Contents: 1 * Car hanger Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.