Designed by professional Syndicate experts under the principle of human motion mechanics. 2.Our Gym products are made of superior imported steels and tubes, Elliptical tubes, Oval tubes, of 3mm in thickness. 3. Processed by physical sand blasting and antirust zinc coating with another two layers of paintings, our machines are made in perfect appearance and hardness with strong anti-corrosion adhesives. 4.Cushions are covered by PU leather, and handles with high quality rubber. 5.Handle caps are all chromed. 6.The seat can be adjusted up and down smoothly with superior gassprings, and the height the advanced wear-resisting systems and Carbon-Dioxide-Protection Welding devices to guarantee the stability and safety of every machine.