Pre-owned Herman Miller Equa task chair, with Iota/Grotto Blue upholstery. Black frame. Price: $179 / (133)  Available   Herman Miller Equa Task (Iota/Grotto Blue) 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.