BEVCO’s Integra ISO 7 Cleanroom Series is an upholstered chair that offers around-the-clock reliability for work environments which need to meet particulate goals of ISO 14644-1 . A unique filtration system traps particles for contamination-free comfort and has been tested by an independent laboratory to certify compliance to ISO 7. The Integra makes working easy! The medium backrest is specifically shaped to provide ample back support and comes standard with a heavy-duty polypropylene back shell to protect the upholstery. The generous seat provides an exceptional seating experience while the thick, resilient, high-density foam provides long-lasting comfort. This non-tilt model features manual back and seat height adjustments for increased comfort during extended sitting durations. The pneumatic height adjustment allows you to easily change your seat height from " - 22". Upholstered vinyl is antibacterial; antifungal and complies with CAL 117. This chair comes with a sturdy 25" diameter polished aluminum base. Model comes standard with dual wheel hard floor casters.