Reliable, lightweight aluminum cylinders from AIR JAX. They are constructed from high-quality materials such as billet T6 aluminum, UHMW bearing material, anodized cylinder, hard-coated pistons and stainless steel return spring. It takes a minimum 200 psi to lift a 2900 lb. car (with 4 cylinders) but the system will handle higher pressures if by accident or intention. Each cylinder comes with four spanner nuts.
Warning: never work under any car without jack stands.