Mobile and adjustable for comfort and productivity Overall dimensions of 31.5"W x 29"D x variable height Meets ANSI/BIFMA standards Durable steel frame with powder coat painted finish Two-tiered shelf design with double laminate wood surface Upper shelf measures 31.5"W x 14"D with 34" - 46"H adjustable height range Lower shelf measures 31.5"W x 16"D with 28.5" - 40.5"H adjustable height range Bottom shelf measures 28.3"W x 15.8"D x 5.5"H Height of lower and upper shelves adjust simultaneously in 1" increments Four 3" furniture grade casters, two with locking brakes, for easy maneuverability and stability Includes all hardware and tools required for assembly Stand up desks promote better posture, reduced back and neck pain, a thinner waist line and other health benefits