Attributes . - 5 x Caster - 1 x Base - 1 x Seat Post - 1 x Seat Post Cover - 1 x Mechanism - 1 x Seat - 1 x Backrest - 2 x Armrest - 2 x Arm Width Adjustment Knob + Washers - 1 x Backrest / Ratchet Screw 8x10mm - 2 x Arm Bracket - 1 x Backrest Post - 1 x Backrest / Mechanism Bolt 8x25mm + Washers - 1 x M6 Size Allen Wrench . Names