Withstanding the real-life rigors of today's 24/7 workplace, the RPM task chair is engineered for durability and priced to fit the budget. RPM features racy lines, one-of-a-kind details, ahead-of-the-curve affordability, advanced adjustments and high-back support. Overall Dimensions: W 24 1/2", H 37 1/8", D 24" Seat Height 16 1/2" to 21". See Knoll website for seating options. GREENGUARD Certification