Characteristics: SUPER SILENT WATER PUMP - Ultra quiet AC submersible pump provides 20,000 hours of long silent operation even at night. You can barely hear the running sound. Kindly Note: The pump is only fit for YOUTHINK flower fountain and ceramic fountain! LOW POWER CONSUMPTION- Pet fountain circulation pump can continuously only use 1.5 degree per month, very energy efficient. 5.9 feet cable COMPACT AND SAFE - The replaceable pump is only 1.7 "x 1.6" x 1.2 "which is extremely light. 12V low voltage AC pump keep your pet safe. (Power adapter is not included) EASY TO CLEAN - Cleaning the pump every 2 weeks is essential for the longevity of the fountain. First, remove the pump cover; Second, remove the rotor cap by placing your fingernail under the small lip located; Third, remove the impeller and wash the parts with soap and warm water SPECIALIZATION - The fountain pump is specially designed for 1.6L BPA Free YOUTHINK Water Fountain and Ceramic Water Fountain. (AC adapter not included) Outlet Outer Diameter: Approx. 10.7 mm / 0.42 inch Inner Diameter: Approx. 7.5 mm / 0.30 inch Package List: 1 x water pump Note: Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.