Tackling a big pressing, pushing, lifting, or spreading job? This TEMCo hollow hydraulic cylinder is a powerhouse. It's rated for 30 US tons (60,000 lbs) of force at its maximum pressure of 10,000 PSI. It's a single-acting cylinder, meaning hydraulic pressure extends the ram, and an internal spring returns it. The 'hollow' design means it has a 1.3-inch center bore, which is super useful for pressing out pins, shafts, or bearings. It has a 4-inch stroke, moving from a collapsed height of about 9.7 inches to an extended height of about 13.6 inches. The body is made from tough, heat-treated steel, and the ram is hard black oxide-plated high carbon steel for durability and corrosion resistance. A huge plus is the included ISO 14540 quick-connect coupler (with a 3/8\ NPT thread), which is a common industry standard, plus an adapter. Backed by a 5-year warranty from a US company. Perfect for heavy machinery repair, automotive work, fabrication, and more.