FRAME MATERIAL: Aluminum BASE MATERIAL: Aluminum CASTER: 75mm 3.0"

COLOR: Black CHAIR TYPE: Ergonomic Series TOTAL HEIGHT RANGE: 120-134cm 47.2"-52.8" BACK HEIGHT: 72-77.5cm 28.3"-30.5" (headrest included) BACKREST WIDTH: 40-50cm 15.7"-19.7" ARMREST TO ARMREST: 69cm 27.2" SEAT WIDTH (INCLUDING SIDES): 51cm 20.1" SEATING AREA: 51cm 20.1" SEAT DEPTH: 45-49cm 17.7"-19.3" (adjustable) DIAMETER OF BASE: 70cm 27.6"