The STIHL 42247648501 Belt Pulley is a genuine OEM replacement part designed for optimal performance in STIHL BR 500, BR 550, BR 600, BR 700, BR 700 X, BR 800 C-E, and BR 800 X backpack blowers. This essential component ensures proper belt tension and power transmission within the machine's drive system, maintaining efficient operation and extending equipment lifespan. Manufactured to STIHL's rigorous quality standards, this pulley guarantees a precise fit and reliable function.