Features:
â—‹ They can be used for window, door and cabinet installations; replaces damaging pry bars and wooden shims. 
â—‹ Very easy to inflate and deflate the shim. When you inflate the air shim, it stays pressurized. When you press the button near the air pump, it can release the air quickly.
â—‹ This makes the wedge a breeze to insert in door. The wedge also has a new rough exterior to help prevent slippage.
â—‹ No trace of pliable surface! Durable enough to be used again and again! Only one person has completed the installation. Effectively save time and labs, saving time and labor costs.
â—‹ Lifting up to 440 pounds (200 kg) solves the problem of imbalance, Span clearance is 0.06 to 2.1 inches (2-70 mm). Thin enough to wedge a gap of less than 2mm. By using four together, you can lift the object to 1760 lbs (800 kg) more stably and safely. 
Descriptions:
â—‹ Material: Polyurethane Rubber
â—‹ Maximum Load: 200 kilograms (440.9lb)
â—‹ Height: 2mm(Before), 70mm (After)
â—‹ Adjustable distance: Approx. 2-10cm (windows, car doors and windows positioning)
â—‹ Application: Auto repair, doors and windows installation
â—‹ Suitable for: used as a spacer when installing car doors, leveling furniture, UPVC windows and doors, kitchen appliances etc.