Feature:1. Made of high quality iron material, strong and durable, stable and reliable, and long service life.2. Unidirectional stream, low resistance, electromagnetic drive, working under low temperature, good sealing performance.3. Backflow valve is suitable for air compressors, etc. The applicable medium is air, which is easy to use.4. Lighter weight than most other check valves, cost saving, easy to install, simple to use.5. Requires no special tools, no soldering, or glue. Just push to create a watertight sealing.Specification:Item Type: Check ValveMaterial: IronThread Diameter: Approx. 1 Inch x 33 x 10mm / 1.3 x 0.4inAir Pressure Environment: Normal PressureStreamwise Direction: One WayDrive Mode: ElectromagneticWorking Temperature: Low TemperatureScope of Application: Suitable for Air Compressors, etc. Package List:1 x Check ValveNote:Due to manual measurement, please allow 0.5‑2 cm difference