Gjpwyfdc Heavy Duty Office Chair Tilt Control Mechanism9.9 * 5.9In,Multi-Angle Arbitrary Locking, For Computer,Gaming Chair Repl

Tips: Please Refer To The Manual For Details. It Is Important To Measure The Mounting Holes Before Ordering. &Nbsp;Install The Upper Ring Onto The Cylinder (Using Short Screws) To Ensure That The Ring Will Slide Along The Cylinder. Install The Hoop On The Lower Surface To The Cylinder (Using Short Screws), Making Sure The Hoop On The Lower Surface Is Tight Enough That It Cannot Slip. Install And Tighten The Two Long Screws Of The Lower Ring Alternately So That The Lower Ring Does Not Tilt And Cannot Be Removed.