Extra-fine (-325 mesh) graphite for use in precision applications, such as locks, bearings, cameras, firearms action parts (recoil, bolt & trigger mechanisms), fishing reels and pinewood derby cars. An excellent conductor of electricity, this powder is used in the manufacture of conductive materials and coatings. Should not be used in ignition switches or other electrically actuated locks.超细（-325 目）石墨用于精密应用，例如锁具、轴承、照相机