1: High back office swivel chair with headrest; 2: Nylon frame,sliding back and seat；the connection between back and seat is solid aluminum alloy. 3: Korean 3D Mesh,including headrest, back and seat. 4: KGS class 4 gas lift; 5: DONATI Synchronized mechanism; 6: 350mm polished aluminum five-star base; d60mm PU casters