1. Product functions: Measure the single-phase non-pulsating flow of gases. 2. It has an exquisite appearance, is light in weight, not easy to break, and has a long service life. 3. It is mainly used for detecting and controlling oxygen flow and can also detect the flow of other gases. This product can be used in industries, oxygen bars, and other occasions where gas flow needs to be calculated. 4. Each product's inner packaging has a unique production part number label, which proves that the product has passed the quality inspection. The label contains information such as the part number, model, and inspection date. 5. If you have any questions about this product, please provide the production part number for our query, and we will safeguard your rights and interests. Material: Acrylic + Plastic + Metal Dimensions: 120 x 72 x 20 mm / 4.72 x 2.83 x 0.79 inches (Length x Width x Height) Interface: 8 mm pagoda interface (hose connection) Center distance: 94.5 mm Applicable medium: Gas Accuracy: 5% Flow range: 3 - 30 liters per minute Working pressure: 0.6 MPa Working temperature: 0 - 60 degrees Celsius Color: Multiple colors (as shown in the picture) Weight: 100 grams Packaging content: 1 LZQ - 7 oxygen flow meter