Omega 18302C Black Hydraulic Bottle Jack - 30 Ton Capacity Effortless air operation will greatly reduce operator fatigue and speed up the efficiency of garage work A compact yet powerful air turbo motor US patent number: 5,341,723 is equipped to raise the load to the desired height efficiently, effortlessly, and safely Versatile quick connector design provides for easy removal of air hose from air motor allowing compact storage or remote operation Chrome plated ram for longer seal life and optimum performance US patent number: 5,946,912, a built-in bypass device protects hydraulic system from over pumping damage