Item Type: Carbon Brush_x000D_ Material: Copper_x000D_ Application: Suitable for electric hand drill, angle grinder, hair dryer, mixer, trimming machine_x000D_ Size: Approx. 7 x 11 x 17mm / 0.3 x 0.4 x 0.7in 1SPECIFICATIONS: Including 20pcs carbon brush, the model is 255 #, the size is 7x11x17mm, sufficient quantity for easy use and replacement. 2COPPER MATERIAL: These carbon brushes are made of excellent copper, with good electrical conductivity, high strength and long service life. 3MAIN PURPOSE: By replacing the carbon brush to repair the intermittent motor, ensure that the equipment operates well, compact and practical. 4WIDE APPLICATION: These carbon brushes can be used for power tools, such as electric drill, angle grinder, hair dryer, mixer, trimming machine, etc. 5REPLACEMENT PARTS: These carbon brushes have reasonable size, which can be directly replaced with old or damaged ones, with strong practicability.1. If sparks appear after the installation of new carbon brushes, please continue to run for 1?2 minutes, and the sparks will disappear naturally after the carbon brushes are fully ground_x000D_ 2. The new carbon brush is worn out quickly after use, which is mostly caused by the unevenness of the commutator. Check whether the rotor is concave or convex_x000D_ 3. After the new carbon brush is installed on the machine, the wire is burnt out. Please stop using it immediately and check the equipment to avoid other injuries. This situation is caused by excessive current caused by desoldering, short circuit, dust and other undesirable links. Please deal with it in a timely manner20 x Carbon Brushes