The ONZA stackable chairs are available in two configurations: fully upholstered seat and back in fabric or vinyl, and upholstered seat and wood back. They are offered with or without armrests or handling grip and casters may be installed. The wood back finish is natural light yellow birch and it comes with a handling grip. A flip-up right or left writing tablet and a dolly are also available for this series. Optional stains are available. The visible metal portion of the seat frame, table and writing tablet are available in black, beige, dark gray, navy blue, light gray, sandex or chrome.