Features: Heavy duty air block for car positioning and door/window installation, featuring rapid inflation/deflation and 150kg load capacity with strong composite component , replacing traditional pry rod and wooden shims. Equipped with a textured not slip surfaces and 1 touch pressure release adapter , this reusable tool ensures scratch easy operate while maintaining constant pressure during installation tasks. Ideal for contractors, enthusiasts, and homeowners seeking efficient solution for precise alignment of doors, cabinets, or automotive components without surfaces damage. Perfect for adjusting uneven gaps during window frame installations, stabilizing heavy cabinets during mounting, or securing vehicles during tire changes and maintenance procedures. simplify your projects with this labor saving essential – its hard construction and ergonomic design enable operate , reducing setup time by up to 50% compared to conventional methods. Specifications: Component : rubber Size: about 16.5x16.5cm/12x19cm/13.5x17cm(optional) Package Includes: 1x Air block note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.