Feature:1. The joint clamping teeth design can clamp the oxygen tube to prevent it from falling off.2. Oxygen pump U‑shaped connecting pipe, anti‑rust, anti‑drop, anti‑crack, easy to install and use.3. Using high‑quality stainless steel material, it is durable and wear‑resistant.4. The incision is machine‑polished and smoothed, so that it won’t hurt your hands.5. Excellent workmanship, widely used in aquarium, fish tanks, and so on.Spec:Item Type: Aquarium U-Shape TubeMaterial: Stainless SteelWeight: Approx. 127g / 4.5ozUses: Carbon Dioxide Refiner U-Shaped Connecting PipeHeight: Approx. 4cm / 1.6inInner Diameter: Approx. 1.6cm / 0.6inNozzle Diameter: Approx. 0.4cm / 0.2inPackage List:10 x U-Shape TubeNote:1.Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.