Features Application: These motor carbon brushes are mainly used to replace the brushes of intermittent motor wear and restore the electric brake of the motor. Suitable for miniature diaphragm pump motors. High Performance: These motor carbon brushes are made of high quality carbon and alloys with good electrical and thermal conductivity for excellent performance, long life and durability Suitable for Power Tools: These motor carbon brushes are widely used in various power tools and motors, such as electric circular saws, miter saws, electric drills, electric hammer drills, dust collectors, etc. Installation Method: In order to make these motor carbon brushes suitable for motor or generator operation, they must be connected to the coil of the rotor to form a complete circuit. Easy Replacement: These motorized carbon brushes are ideal replacements for old and damaged carbon brushes; the set contains 100 carbon brushes, a sufficient number for your long-term use and easy replacement. Specification: Item Type: Carbon Brush Model: J420 Size: Approx. 6 x 6 x 15mm / 0.24 x 0.24 x 0.59in Scope of Application: Miniature diaphragm pump motor Package List: 100 x Carbon Brush Package List 100 x Carbon Brush