40-668 | Magnetic Floor Switch, Normally Closed. Extra wide gap. Magnetic contacts embedded in solid aluminum block. Switch wires protected in a flexible steel jacket. Size: 5/8" x 1/4" x 3 1/2". Normally closed with magnet in place. 2 1/2" operating distance. Alnico magnet. UL approved. Rating 100mA-100V DC max., 1 Amp-10V DC max., 10 watts max.