Specification: Type: Unadjustable & AdjustableMaterial: POM PlasticFor Tube Outside Diameter: Please Browse the Pictures CarefullyFunction: Control Liquid Flow & Shutting Off/ Open the Liquid Package Include: Single Position:3-4mm / 0.12-0.16 inch 10pcs5-8mm / 0.2-0.31 inch 10pcsAdjustable:3-6mm / 0.12-0.24 inch 10pcs 6-12mm / 0.24-0.47 inch 10pcs 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 d: If you are not satisfied or have any questions with any Kyuiontys 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.