This soft air cushion provides a powerful and controlled 150kg lifting pressure. It is ideal to use when levelling windows, installing cabinets, positioning heavy doors and many more jobs. The wedge has a 160 x 160mm contact surface. The 2 - 50mm expansion range allows it to fit in the smallest of gaps and provide a high level of adjustment. It also has an internal reinforcement bar to ensure its inflation is rigid and does not fold up in tight places. It is fitted with a high-frequency welded and bonded hose to ensure it will not fail under pressure. Plus, it has a pressure relief valve to facilitate controlled decompression and height adjustment.