1. Working cylinder utilize cold-drawn high-precision seamless steel tube;
2. Reserve tube select high strength cold-rolled steel tube;
3. High strength and finished piston rod;
4. All-weather lubricating oil, which has excellent performance of anti-bubble, anti-oxidation and viscosity;
5. Unique lasting valves design;
6. Wear-resisting non-oil compound;
7. High wear-resisting and compression-resisting quality oil seal.