1.Zhongwei 3 lever heavy duty mechanism
2.320mm nylon base
3.BIFMA castors
4.armrests available
5.DIN 4550 Class III gaslift
6.iron plate reinforce the back
7.cut foam for seat and back
8.color:blue
9.volume:.136CBM
10.GW:16KG
11.test rated:AS/NZS 4438(Level 6)