High-Clearance Bottle Jacks, Jack Type Bottle Jack, Load Capacity 20 ton, Lifting Actuator Screw Adjustment, Power Source Mechanical, Minimum Height 15 13/16 in, Standards ANSI/ASME B30.1, Base Length 10 5/8 in, Base Width 7 3/16 in, Center Hole Diameter 13/16 in, Extended Height 25 in, Extension Screw Length 12 in