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Carbon brush materials mainly include electrochemical graphite, fat graphite, metal (copper, silver graphite. Brush with resin, electrochemical and non-ferrous metals, they are with different materials and technology used in different motor. Brush as a sliding contact parts, widely used in many electrical devices. Product main materials include electrochemical graphite, fat graphite, metal (copper, silver graphite. Brush is a motor or generator or other fixed part of the rotating machinery and rotational part between energy or signal transmission device, it usually is made of pure carbon and solidifier, appearance is generally square, card on the metal stents, there is a spring pressed it on the shaft. On the top of the brush looks like rubber strip, wire leads. Be of great ? volume