FIN Mesh HB Chair 101-02 is a light body. PA+GF back frame, Adjustable armrest, 50 density molding foam, Adjustable lumber support, 4D move PU armrest, 60R black nylon castors, 350mm aluminum base, 100mm black class-3 gas lift, Self-adjustable mechanism, 4 locking position, seat slider movement with 53mm, Plastic seat cover