uxcell NO NC Optional Screw Mount Magnetic Door Contact Reed Switch 3 Set Product Name : Magnetic DoorContactReed Switch;Model : MC-31B;Contact Type : NC/NO Optional Gap : 15-25mm;Contact Capacity : 0.5A(Maximum Switch Current);Voltage : DC 100V Rated Power : 10W;Each Size(Approx) : 55 x 12 x 11mm / 2.2" x 0.47" x 0.43"(L*W*H);Mounting Hole Size : 7 x 2.5mm/ 0.28" x 0.1"(L*W) Color : White;Housing Material : ABS Weight : 60g;package Content : 3 Set xMagnetic DoorContactReed Switch6 x Installation Screws