Features: Precision-Flow Control: Adjustables and consistent flows rates to maintain-optimal water conditions for different aquarium setups and aquatics-species. Corrosion-Resistant: Constructed from quality materials for long-lasting performance in both freshwater and saltwater environments. Leak-Proof Design: Equipped with secure-seals to ensure a watertight connection, preventings leaks and maintaining system integrity. Easy Installation Compatibility: User-friendly design that fits standard tubing sizes and integrates seamlessly into existing aquarium filtration systems. Quiet Operation: Engineered to reduce noise and vibrations, creating a peaceful environment for aquatics-life and aquarium owners. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: PVC Inter Diameter: 12mm Oute Diameter: 16mm Package List: 1x Aquarium Water Control Valves