Attributes . 5 x Casters1 x Base1 x Seat Post1 x Mechanism1 x Seat1 x Backrest2 x Armrest2 x Arm Width Adjustment Knob with Washers2 x Arm Bracket1 x M5 Size Allen Wrench1 x Arm Depth Adjustment Knob with Washer1 x Backrest Screw1 x Backrest Post . Names