Selson air jacks are a unique design that uses compressed air to raise and lower motor vehicles quickly and easily. Their safety, reliability and speed make Selson air jacks the ideal choice for underbody servicing, wheel alignment, tyre replacement services and body repair work. Their speed of operation over conventional jacks will significantly reduce the time required to lift a vehicle. Inside the air jack there is a unique internal telescopic stabilising column. The working pressure for Selson air jacks is 100 psi. Very few moving parts mean maintenance costs associated with Selson air jacks are kept to an absolute minimum. The air springs are made of a 2-ply neoprene rubber. Selson air jacks will not leak, deflate or become unstable. Only one airline needed. Once in a lift position, the airline can be disconnected and the jack will continue to do its job.