| | | Swivel chair, low back, basic mechanism | Swivel chair, low back, synchronous mechanism | Swivel chair, high back, synchronous mechanism | Swivel chair, backrest mesh-covered, basic mech. | Swivel chair, backrest mesh-covered, synchronous mech. | Swivel chair, backrest mesh-covered, synchronous mech., with headrest | Four legs, stackable | Cantilever model, stackable | Fixed base, seat height adjustment | |