Item Type: Carbon Brush_x000D_ Material: Copper_x000D_ Application: Suitable for electric hand drill, angle grinder, hair dryer, mixer, trimming machine_x000D_ Size: Approx. 16 x 5 x 20mm / 0.6 x 0.2 x 0.8in 1SPECIFICATIONS: Including 20pcs electric carbon brushes, compact size, sufficient quantity for easy installation and replacement. 2COPPER MATERIAL: These carbon brushes are made of excellent copper, with high strength, wear resistance and scratch resistance. 3USED FOR ENGINE: Replace the old or damaged carbon brush, ensure that the engine runs well, and repair the intermittent motor. 4MULTIPLE USAGES: The carbon brush is applicable to electric hand drill, angle grinder, hair dryer, mixer, trimming machine, etc., simple and practical. 5COMPACT SIZE: These electric tool carbon brushes have compact size, convenient installation, space saving and wide application.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 Brush