Sunex 5081B 8-Ton, Long Stroke, Bottle Jack Used for farm applications but primarily for IEM applications in manufacturing or engine cranes and handling equipment requiring long hydraulic stroke. RapidRise hydraulic system and pivoting base on the model RS5218AHR raises the ram twice as fast as a standard jack Ductile iron base for added strength. Larger ram diameters to withstand side loads Hydraulic bypass system prevents over extension of ram.