12 TON AIR/HYDRAULIC BOTTLE JACK 90-180 PSI. Factory pre-tested to 150% of rated capacity. Safety bypass system. Dual ram return springs.. Saddles are machine-hardened steel. Capacity: 12 Tons Low Ht: 10-1/4 High Ht: 19-3/4 Lift: 6-3/4 Screw Ext: 3 Base: 8-1/2x 5 Ship Wt: 30 lbs.. AFF Air/Hydraulic Bottle Jacks are used to lift heavy-duty trucks, construction and heavy farm equipment. Both have centered pumps and rams with heattreated pistons for balance and easy positioning. Saddles are made of machine-hardened steel. Each operates at 90-180 PSI and are factory pretested to 150% of its rated capacity. They also include a safety bypass system to prevent possible damage from ram over-extension. 5512B