* According to the theory of human engineering, emphasis on human nature * Decorative coating, available in genuine leather or in fabric * Polyurethane cushion, available in different density * Steel support casting, supporting seating and connecting the five-bar base * Seating base made of fine-cast alloy from Germany * Quality corium show carefulness and delicacy in every detail * The SUSPA automatic syclotron air-control device imported from Germany * Various styles with complete functions and different structures. Either with or without armrest and different selections of various colors of linen and velvet covers, fit different office environment * With both pneumatic and helical up-down, adjustable backward bending angle, synchronous forward and backward bending and with stretching functions for seat and back, helping relax your back after long time fatigue. * Various structures for you to choose which supporting your back comfortably to straighten your back and keeping your back and waist healthy. * The steel-tired foot structure is suitable for table works such as bar, laboratory and drawing, ect.