Package: 5 x MCCVDB0 Check Valve Let your pump have spare parts for emergency use. High-Quality：Our check valve duckbill is made of high-quality materials, and is durable after strict quality control process testing.After we improved it, the duckbill valve has a slit that allows you to flow smoothly during injection, ensuring the operation of the machine. Replacement：replace broken, cracked, or defective check valves on your pump. Easy to install：Our check valve duckbill is easy to install and replace. If you can't take out the old duckbill pliers with pointed nose pliers, please use the round end of the drill bit to push it out. After Sales：we will provide you with excellent quality products. If you have any questions or are not satisfied, please contact us.