OTC Stinger 50-Ton Bottle Jack is a very competitively priced line of bottle jacks that offers the quality and reliability that the market has come to expect from OTC. Jacks can be used in vertical or horizontal positions. Fewer working parts, extremely smooth bearing surfaces, and close tolerances ensure long life. The oil bypass system prevents the lifting ram from being over-extended. Features: stroke 5 inch, retracted height minimum 9-1/ 2 inch, height with screw extended 14-1/ 2 inch, pump strokes to extend piston 1 inch 40, saddle diameter 3-1/4 inch , and base size is 7 inch x 8-1/ 2 inch.