Product detail:Special Purpose Chair
  Base
    -Aluminium Polished Base (BC3)
    -Nylon Flat Base (NB5)

E-pron Sychron Mechanism (5 Position Locking) with Back Ratchet (M7RB1)

Adjustable Armrest
    -6 Height Adjustable Armrest (58A)
    -7 Height Adjustable Armrest (65A)
    -Rotated Armrest (89A)

Heavy Duty Nylon Castor (R1)

Dial Up Lumbar Adjustable (LA1)

Seat Pan Sliding (SS1)

Moulded Seat Foam (MS1)