1. JIS standard is implemented. 2. C clip is adopted to connect the cylinder body and back cover or front cover, and riveted structure is adopted to connect piston and piston rod to make it compact and reliable. 3. The internal diameter of the body is treated with rolling followed by the treatment of hard anodizing, forming an excellent abrasion resistance and durability. 4. The seal of piston adopts heterogeneous two-way seal structure. It has compact dimension and the function of grease reservation. 5. Compact structure can effectively save installation space. 6. There are magnetic switch slots around the cylinder body, which is convenient to install inducting switch. 7. Installing accessories with various specifications are optional.