| standard | optional | |||||
| Headrest | 2D headrest | No headrest | ||||
| Backrest | PA + GF back frame with breathable and comfortable mesh + height adjustable lumbar support | |||||
| Armrest | 4D armrest | 2D,3D armrest; fixed armrest | ||||
| Seat | molded foam, no wood | plywood with molded foam | ||||
| Mechanism | Four-position locking mechanism with quick tension adjustment and seat sliding | four-position locking auto-weight mechanism with seat sliding; three-position locking mechanism with seat sliding; one-position locking mechanism |
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| Gaslift | Class 4 gaslift | Class 3 gaslift | ||||
| Base | Aluminium base | chromed steel base; nylon base | ||||
| Casters | 60/25 PU silent casters | PU casters | ||||
