CMI-GCR3-PR and CMI-GCR3-BK are the product numbers. Black and purple Measurements: Total Height Range: 125.5-133.5 cm; 49.4"-52.6" Backrest Height: 82 cm; 32.3" Backrest Width: 58 cm; 22.8" Armrest to Armrest: 71 cm; 28.0" Seat Width (including sides): 58 cm; 22.8" Sitting Area: 38 cm; 15.0" Seat Depth: 54 cm; 21.3" Base Diameter: 70 cm; 27.6" Seat Thickness: 10.5 cm / 4.1" Height Adjustability 8 cm / 3.1" Armrest Adjustability 28.5-36.5 cm / 11.2"-14.4" Floor to Seat Top 48-56 cm / 18.9"-22.0" 90–180 degrees 2D Armrest The headrest Extremely cozy memory foam Ultra-comfortable memory foam for lumbar support Perforated PU Inner Material Outer Material Cut foam for the backrest and cold-molded foam for the seatbase Steel Base Material for the Frame (leg) Chair Type Caliber Steel Caster 60 mm / 2.4" Gas Lift Class 4 Maximum Weight Load 150 kg / 330 lbs