Knoll Life task chair, with Eclipse mesh seat back, black leather seat topper, and black leather seat. Chrome adjustable height arms, with black arm pads. Full ergonomics. Chrome frame. Price: $395 / (55) Available Knoll Life Task (Black Leather) If you have office furniture needs, Office Furniture Center is a nationwide provider of cost-effective workstations, desks, credenzas, seating, filing, reception and conference furniture. Our entire inventory of affordable office furniture is located in Chicago; to browse our selection, please visit officefurniturecenter.com.