The air bag pump is made of rubber which is easier to lift and is more wear-resistant and does not damage the doors and windows of the car. Only an installer is necessary to safely manage full-fledged installations with a load of 200 kg in order to meet the nominal value, which saves time and labor costs. L Operation is simple, just squeeze the pump to inflate. After finishing the job, just press the purge button to release the air. Wide range of applications: It is very suitable for leveling furniture, windows, doors, cabinets, electrical appliances , HLK, pipes, chimneys, bathroom faucets, curtain fronts, etc. It is a great construction machinery tool kit. Note: Do not inflate too much to avoid damaging the bag or the valve. The inflatable shim bag does not damage objects during use, leave marks or scratch the surface objects and is an excellent replacement for traditional wooden joints.