Adjustable from 17" to 21 1/2", Conductive grade II vinyl, Ergo tilt control, 19" wide x 18" deep contour seat pan, 17-1/2" wide x 12-1/2" high back, # 07 conductive die cast steel dual wheel, 25" diameter 5 legged polished aluminum base, Class 100 cleanroom package,ESD package with circuit board. Color choices include Royal Blue or Black. - The Stamina 3000 Series is very well known and is highly regarded as one of the best chairs on the market for Cleanroom, ESD and general production facilities. The Series continues to be specified as the standard chair for many of the Fortune 1000 companies. Multiple heights are available to cover everything from desk to high bench. Numerous options make it easy to fit most end users and their applications.