Color: anti-static PU leather, Two colors, i.e. blue and black, are available. Dimension: 430*400mm(chair seat); 400*300mm(chair back) Height adjustable between about 520-660mm (supplied with 140mm adjustable pneumatic rod) Surface resistance: 104 106Ω or 106 109Ω. System resistance:≤109Ω Specification:steel chroming five-star-foot; high strength and durable nylon castor;adjustable supplied with footrest ring;conductive metal chain