The Keurig K-Duo 5100 Replacement Water Pump Pump CJWP27-AC12B3 is a clear plastic part specifically designed for Keurig coffee makers. This single-pack water pump is compatible with Keurig machines and serves to replace a broken or malfunctioning pump, ensuring your coffee maker continues to function properly and deliver your favorite beverages. Perfect for those looking to maintain or repair their Keurig coffee maker, this replacement part is essential for keeping your machine in top working condition.