- the clever way Robust motor carbon brushes for repairing your electric devices – save money and resources by easily repairing your devices yourself. Dimensions: 30 x 12 x 6 mm – precisely manufactured and durable. With spring. Motor carbon brushes are used to conduct electrical current to the commutator or other moving parts of a motor. It is normal for carbon brushes to wear down over time. When the brushes are worn, your device may not work at all or may function poorly. Simply replace the old motor carbon brushes with these high-quality replacement brushes to restore proper function. There is a wide variety of motor carbon brush types. Each manufacturer and device uses different sizes and shapes. It is not always possible to list all compatible models. Please compare the shape and dimensions of our carbon brushes with those from your device to verify compatibility. Package includes: 2 x Carbon brushes Technical specifications: Material: Graphite Dimensions: 30 x 12 x 6 mm With spring Weight (set): 11 g Compatible with the following device models: Rainbow D3 Rainbow D4 Rainbow D4G SE Replaces the following original part: Rainbow RX-R/2421 - the clever way High-quality replacement parts and accessories for extended lifespan of your electrical devices.