Mesh chair Material: Armrest : PA&PU Base : PA base Back : Plastic with 30% fibreglass, mesh Seat : Plastic with 30% fibreglass, normal sponge, PU Castor : NylonFeature: 1.Adjustable armrest ,lumbar support 2.Test standards:. a) Base and castor : Bifma c) Mechanism : SGS d) Gas Lift : SGS 3.The back can betilted and fixed 4.Gas permeability condition is goodLoading information: CartonSize :66*38*64cm N.W(KG) : 19.5 G.W(KG) : 21.0 Loading Capacity(40/HQ) : 420.