The Height-Adjustable Single Column Standing Desk Laptop Stand offers a simple and cost effective workspace option. Turning the oversized thumb screw lets you access a wide range of sitting and standing height settings. User friendly features include a single column construction and a specially designed base to optimize leg room. A sturdy, all metal powder-coated frame ensures durability. The desktop provides plenty of room to work while still maintaining a small footprint. Overall dimensions are 23.5" X 15.5" X 28" to 40". Desktop dimensions are 15.5" W X 23.5" L. Base dimensions are 16" W X 23.5" L. Height adjustment range is 28" to 40" H in 2.5" increments. Weight capacity is 50 lbs. 2" casters (two with locking brakes). 5-year limited warranty against defects. Stand Up Desk Store is based in the suburbs of Chicago.