E900 Hardware P728 Plug End (0.177 in #7 Wire) Black Steel Garage Door Extension Spring Ceiling Grid Covers Sturdy durable lightweight construction: lightweight Specification Details Material Ceramic Sturdy durable lightweight construction: lightweight construction makes these easy to move from kitchen to your comfy couch to home office give to your favorite colleague at work or boss who could benefit from this health promoting footrest leg lifting device leave under your desk at work or use at home on your couch for your feet it's easy to use this comfort leg and foot support anywhere With its fine workmanship Package Quantity 1 Package Contents One one piece garage door plug end extension spring Color Finish Family Black Length (Inches) 28 Material Steel Manufacturer Color Finish Black Sub Brand P728 Plug End ( 7 Initial tension: 110 pounds 120 pounds Maximum allowable stretch: 18