Specification: Type: Adjustable Material: POM Plastic For Tube Outside Diameter: 12-18mm/ 1/2inch - 5/8inch Function: Control Liquid Flow & Shutting Off/ Open the Liquid Note: Light shooting and different displays may cause the color of the items in the picture to be slightly different from the real object. Due to manual measurement, please allow +/- error of 1-3 mm. 100percent Satisfaction : If you are not satisfied or have any questions with any Kyuionty's products, please feel free to contact us with email to get a satisfied solution. We want our customers to enjoy a 100percent satisfied shopping experience.