BEVCO's sit stand promotes dynamic standing by allowing you to stand throughout the day while periodically perching upon this stool to take weight off of your legs and lower back. The 13" wide, 13" diameter black polyurethane seat is antibacterial, impervious to water, oil and most chemicals. The texture on the seat provides a non-slip surface that is puncture-resistant and easy-to-clean. The 11° forward tilt enables personalized adjustments for maximum ergonomic comfort. A convenient pneumatic height adjustment allows for stress-free seat height changes from 22” - 32”. The sturdy 25" diameter polished aluminum base comes standard with mushroom glides.