This is an Equa Desk Chair, originally designed by Bill Stumpf for Herman Miller. These particular examples date to the 1990s. The chairs have a full dark brown leather upholstered seat atop a five-star aluminum base. The listed price includes one chair and there are 9 available to purchase. The chair measures 24.5 inches deep, 26.5 inches wide, and 33 inches high with a seat height of 18.75 inches. This piece does show minor wear as expected from previous use, but overall is in good to very good condition. Please see photos.