Boss Office Products Set of 2 Black Contemporary Ergonomic Task Chair Forming Nails Extreme protection technology (XPT) engineered 1000173277 Extreme protection technology (XPT) engineered for improved dust and water resistance for operation in harsh job site conditions Specification Details Battery Power Type Lithium Ion Battery Voltage (V) 12 Battery Amp Hours 6 Economical stack chair provides superior durability and lumbar support Black polypropylene seat and back Solid chrome frame An opening integrated in the sculpted seat back allows for ease of movement and stacking May be stacked 16 high on dolly Collection Name none Color Finish Family Chrome Manufacturer Color Finish Black Back Material Plastic Seat Material Plastic Frame Material Metal Wood Species Poplar Finish Type Metal Style Contemporary Trend Modern Type Task Number of Casters Wheels 0 Maximum Seat Height (Inches) 18 Minimum Seat Height (Inches) 18 Seat Back Height (Inches) 12