High Quality Materials: The air wedge is made of urethane rubber. It's durable enough to be used again and again and the scuff-free lid leaves no marks. They won't be damaged or worn and contact surfaces during use.Bearing Capacity: Each inflatable lifting cushion can load 200kg, which can easily solve the problems caused by insufficient bearing weight when installing doors and windows.Easy to Use: This airbag is so simple to use, pump to inflate and press a button to quickly release the air. Easy to position for all installation tasks to make perfect alignments. Easy to store and carry.Features: Air wedge door pump up bags for window, door,car and cabinet installations, replaces damaging pry bars and wooden shims. It is not risk of damage to surroun.