Got a heavy hatch, trunk lid, or truck bed that won't stay up? This gas strut (or gas spring) is here to fix that. It's got 200 pounds of lifting force to reliably hold up whatever you need. The measurements are key: it's 28 inches long when fully extended (measuring from the center of one ball socket to the other) and compresses down to 16.5 inches. The ends have 10mm ball sockets, which is a common fitting. This is for ONE strut – remember, many applications use two, so you might need to order a pair. Perfect for replacing worn-out struts on cargo doors, tool chest lids, camper shells, or hydraulic bed lifts. Installation is usually simple – just pop the old one off and clip this new one on. Get that door holding itself open safely again.