CH-391B-XL

Mesh: YM99-21M series
Seat fabric: OS-300 series
Frame: Black plastic+ glass fiber frame
Back: Fixed lumbar support
Arm: Up and down armrest 
Foam: High density foam
Mechanism: 3-position lock synchro tilt mechanism with seat sliding function.
Gas lift: 100mm extended length, Class-3 gas lift
Base: 340mm nylon base+60mm nylon caster