21.

Metal Mechanism
Model: CH-606B, CH-606BT

22.

Metal Mechanism
Model: CH-606ST, CH-626TPC

23.

Metal Mechanism
Model: CH-626T, CH-616

24.

Metal Mechanism
Model: M-8B, CH-12A

25.

Metal Mechanism
Model: CH-09, CH602B

26.

Metal Mechanism
Model: CH-609, CH-609B

27.

Metal Mechanism
Model: CH-45A, CH609C

28.

ADJ-Mechanism
Model: BHM-Series
back-height

adjustable

mechanism

29.

ADJ-J-bar
Model: JB-05, JB-06
J-bar with height adjustable

30.

PP-Armrest
Model: CA-204AP, CA-205P, CA-213P