These comfortable Knoll Open Up stack chairs have a black mesh seat back, black upholstered seat and chrome sled base. The chairs are in like-new condition and are a testament to Knoll's renowned design and handiwork. Price: $125 / Availability: (126) In stock     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.