Premium Material: We use durable TPU composite fabric to wrap the 420D nylon material to achieve higher wear resistance. The edge of the wedge-shaped air bag pump is sturdy and durable, and the appearance is smooth, and it can be easily stuck in any narrow space. Easy to use: This air pump dunnage bag safely handles full-size installations with just one installer. Using a simple pressure pump and precise bleeder valve lets you raise and lower for perfect alignments. Ideal for laying, adjusting, maintaining, lifting and installing. Strong load bearing: This powerful hand pump lifts up to 400 lbs, span spreads from 3/32 to 2 inches. It can bear weight 150-200kg, the adjustable range is 2-80mm. Saving time and labor. (REMARK : do not over-inflate to avoid damaging the bag or the valve.) Convenient and environmentally friendly: Environmentally friendly materials, no pollution, safe to use. The surface of the air pump wedge is made of TPU rubber. It will not damage the surface of doors and windows, ensuring perfect installation effect. Wide Application: Our bags of air wedges are ideal for many jobs and applications such as precise alignment and leveling. It can be used for beams, cabinets, doors, equipment, furniture, HVAC, plumbing, joists, countertops, mantels, bathroom fixtures, curtain wall flanges, windows, etc. Number of pieces delivered: 3 Color: green, black and white Size: 15.5*16cm