Features: Great for irrigation, chemical-industry, waterwork and so on. Permanent-magnet will never rust. Prevent water ingress and never age. Water flow sensor only, other accessories demo in the picture not included! The sealing rings adopts the structure under the upper and lower forces to never leaking water. Made of high quality material, solid, durable and good performances, serve you for a long for-time. With stainless steel bearing inside the impeller, supper wear-resistant. Specifications: Model: DN15 Material: Plastics, Metal Measuring range: 1-30L/min Interface: 20mm/0.79in Length: Approx.5.8cm/2.28in Color: Black Quantity: 1 Pc Qvalue: 6xQ (Flow) Qvalue: 10xQ (Flow) Wire Length: Approx. 450mm Sleeve: Approx. 350mm Accuracy: 5% Output Voltage: 4.5V Supply Voltage: 5V Installation Type: Any Direction Package Includes: 1 x Water Flow Sensor note: No retail package. Please allow 0-1cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!