Magnetic single check valves 1. Produced by valve seat, Copper tube, Film and Mesh.  2. Inner Diameter of Connection from 1/ 2''to 2 5/ 8''. Diameter of valve body from 28. 6mm to 105mm With Max. Working pressure 4. 5MPA 3. Magnetism valve desinged, Retaining screen fixed in the body. 4. Nearly no leakage when in the contray direction. 5. No limited at the install position. 6. Hermetically structure. 7. General using type of connection size, Easy to change