Black Bull AIRBJ20 20 Ton Manual Air/Hydraulic Bottle Jack Great for shop, farm, or job site; for industrial use in repairing trucks and other heavy equipment Manual or pneumatic operation, Includes 40 inches air hose Minimum height: 10 3/8 inches; maximum height: 20 inches (with screw extended 3 inch) Base dimensions: 8 3/4 inch x 5 1/4 inch Air valve inlet: 1/4 inch - 18 NPT, 120 To 200 psi