Use of special low-carbon steel forging process produced by Melaleuca iron materials, and more to improve conductive magnetic properties, the appearance of hand-polishing, the surface pattern clear, strong bump texture, framework consists of precision wire cutting[ensure the size precision, to avoid the manual Machine size error]coil using the latest etchnology imported 10 laps solenoid valve, 3V to start 6-8V to wrok, running frequency of 2500 turn, bouncing stability, the advantages of the rear magnetic stronger.