Managerial Mid-back Chair With Fixed Arms Offers Patented Hip-pivot Motion That Provides Exceptional Comfort. Seat Remains Stationary While Back Adapts To Body Movement. Functions Include Pneumatic Seat-height Adjustment, 360-degree Swivel And Tilt Lock. Seat Size Is 20-1/2" Wide X 17-1/4" Deep X 16" X 21-1/8" High From The Floor. Back Measures 19-1/4" Wide X 19" High From The Seat. Distance Between The Arms Is 18-3/8". Five-star Base Has 2" Hooded Dual-wheel Casters. Chair Is Available In Black Frame Only. Certified By Scs To Be In Compliance With Specific Indoor Air Quality Emission Requirements. Meets Or Exceeds Applicable Ansi/bifma Standards.