2.5mm Thickness butterfly mechanism, can meet BIFMA standard. Extra plastic cover give you the most safety daily using. Knee titl tension adjustable. Double russel mesh on the seat.
BIFMA & EN1335 standard gas lift. Meet 100,000 times fatigue test.
Chrome base have 1136kgs upright static pressure.
Nylon castors with 100,000 times rolling fatigue test (under loading 120kgs pressure)
Color: Black, Brown, Blue, Gray, Red, normal color