Mechanism is the hidden engine beneath your seat .

Features : * responsible for how smoothly you recline, tilt, or adjust height. * Accept gas lift * Tilt & Recline Function: Lean back comfortably with controlled resistance * Height Adjustment: Built-in gas lift support for smooth up/down movement * Locking System: Lock your preferred angle for stable sitting * Durable Metal Build: Strong enough to support daily, long-hour usage For control spring tension Certification : BIFMA TUV SGS REPORT.