Item Type: Aquarium U-Shape Tube_x000D_ Material: Stainless Steel_x000D_ Weight: Approx. 127g / 4.5oz_x000D_ Uses: Carbon Dioxide Refiner U-Shaped Connecting Pipe_x000D_ Height: Approx. 4cm / 1.6in_x000D_ Inner Diameter: Approx. 1.6cm / 0.6in_x000D_ Nozzle Diameter: Approx. 0.4cm / 0.2in 1The joint clamping teeth design can clamp the oxygen tube to prevent it from falling off. 2Oxygen pump U?shaped connecting pipe, anti?rust, anti?drop, anti?crack, easy to install and use. 3Using high?quality stainless steel material, it is durable and wear?resistant. 4The incision is machine?polished and smoothed, so that it wont hurt your hands. 5Excellent workmanship, widely used in aquarium, fish tanks, and so on.1.Please allow 0?1 inch error due to manual measurement. Thanks for your understanding._x000D_ 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.10 x U-Shape Tube