| standard | optional | |||||
| Headrest | 2D headrest | no headrest | ||||
| Backrest | PA + GF back frame with special nylon mesh + fixed lumbar support | |||||
| Armrest | fixed PP armrest | 2D, 3D, 4D armrest | ||||
| Seat | molded foam | |||||
| Mechanism | one-position locking explosion-proof mechanism | three-position locking mechanism with seat sliding; four-position locking auto-weight mechanism with seat sliding |
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| Gaslift | Class 3 black gaslift | Class 4 gaslift | ||||
| Base | 340mm black nylon base | chromed steel base; aluminium base | ||||
| Casters | 60/25 black PU casters | Silent PU casters | ||||
