For RS550 motor, lightweight and compact, pack of 2 - Constant electrical contact: This car carbon brush holder ensures stable contact between moving components and electrical connections, enabling a uniform current flow in the internal motor systems and supporting smoother starts and reliable power transmission. - Supports system efficiency: By properly aligning the brushes, the holder promotes even wear and even pressure distribution, helping to reduce spark formation and improve electrical reliability in daily vehicle operation. - Restores internal functionality: This in-vehicle brush holder securely fixes brushes and helps restore performance losses caused by weak contact or a worn bracket, playing a key role in the effective operation of starter or alternator systems. - Compatibility and purpose: Designed for RS550 motors, delivering reliable performance as a replacement brush holder for in-vehicle use to maintain starter and alternator function. - Practical use scenarios: 1) During maintenance when RS550 motor brush wear is observed, install this pack to restore starter or alternator performance. 2) In everyday vehicle operation to maintain stable electrical contact, reduce spark risk, and improve starting reliability. 3) As a part of routine electrical system servicing to prevent performance loss from weak contact or worn brackets.