Rolland Office Chair Gas Lift Cylinder – Universal Size Fit All - Heavy Duty - Black<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Outer cylinder diameter: 2 inches， Inner cylinder diameter: 1.1 inches</li><li>Minimum length: 10.5 inches</li><li>Maximum length when fully extended: 15.5 inches</li><li>Adjustable range: 5 inches</li><li>Heavy duty weight rating: 320 lbs. / 5 years manufacturer warranty</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31rF3Ur0UPL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31IisVNUhLL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/411cIYK4ntL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51o8aMS-TgL.jpg" noproxy>