Ergonomic sit stand stool by By Global Industrial is designed to allow mobility without adding pressure to back and lower body. Great when working for long periods of time on machinery or assembly line. Tilt control knob allows seat to tilt 15° with you, or can be locked for stability. 24" 5 Blade Style has 13"W x 10"L seat with 23 to 33.5" pneumatic height adjustment for easy operator positioning. 2 Year Limited Warranty.