The Keurig K-Duo Essentials 5000 Mini Air Pump Replacement Part# KPM27W-12B is a metal & plastic unit specifically designed for Keurig coffee makers. This part, compatible with Keurig machines, serves as an essential component for the functioning of the coffee maker. With a wall plug-in power source, this multicolor unit is a single quantity item that provides the necessary air pump functionality required for the Keurig coffee maker to operate efficiently. SHIPS FAST!