The AFF Viking 20 Ton Air Assist Bottle Jack, No. 54200, features a fully welded construction to provide maximum strength and leak free operation. It effortless air operation reduces user fatigue and aluminum air motor design delivers fast, consistent, and reliable operation. In addition, the external return springs accelerate ram retraction for maximum productivity and the safety bypass system prevents accidental overload. The bottle jack meets 2014 PASE/ASME standards, has a minimum height of 10-1/4" and a maximum height of 19-3/4".