These are Saarinen Executive Armless Desk Chairs with swivel bases, originally designed in 1957 by Eero Saarinen and produced by Knoll. These particular examples were produced in 2017. Their design features a black steel base, and they have upholstered seats in yellow fabric. These examples feature a pneumatic lift base. The listed price includes one chair and there are six available to purchase. Each chair measures 22.5 inches wide, 25 inches deep, and 31 inches high with a seat height of 14.5 inches. These pieces show minor wear from previous use and overall are in very good to excellent condition. Please see photos.