This product is a pack of 4 inflatable air wedges for automobiles. They can be used for installing windows, doors and cabinets; Replace the crowbar and wooden gasket. It is very easy to inflate and deflate the gasket. When you inflate the air gasket, it will remain pressurized. When you press the button near the air pump, it can release air quickly. Without a flexible surface! Durable enough to be used again and again! Effectively save time and laboratory, save time and labor costs. Type: air pump bag Material: TPU Color: black Size: about 16 x 15cm (length x width) Features: This product is a pack of 4 inflatable air wedges for automobiles. They can be used for installing windows, doors and cabinets; Replace the crowbar and wooden gasket. It is very easy to inflate and deflate the gasket. When you inflate the air gasket, it will remain pressurized. When you press the button near the air pump, it can release air quickly. Without a flexible surface! Durable enough to be used again and again! Effectively save time and laboratory, save time and labor costs. Package Contents: 4 x Air pump bag Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.