Mr IRONSTONE Height Adjustable Desk 45.7" Mobile Computer Desk Home & Office Utility Table with Rolling Wheels（Non-Automatic Adjustment） (Spatter Gray)Ergonomic Adjustable Height Design: Mr IRONSTONE adjustable height desk helps you get rid of the sedentary work habit. When you use the standing height, it is good for your health of the neck & spine. Manual Height Lifting Adjustment (Not Auto) with 5 Height: Lay the desk down, loose the two operating screws on the desk frames, then pull or push bottom desk legs to rise the desk height from 27. 9 to 42. 5, finally tighten the screws by your hands. 5