HPC’s Air Wedge slides between the vehicle door and the weather stripping on the door frame. Then the pump is squeezed, inflating the Air Wedge and separating the vehicle door from the frame. This provides more than ample room to insert a car opening tool. Typical Pressure 220 lbs; Maximum Pressure 440 lbs; Thickness, not inflated 0.08″/2 mm; Thickness maximum inflation 2.75″/7mm; Dimensions 6.25″/16mm x 5.75″/14.5mm; Material – reinforced vinyl.