40-670 | Metal Ball Plunger Switch with Ball Depressed, Normally Closed. Completely environmental proof for window, door protection, etc. Mounts in 3/4" hole. Mounting centers 1 3/16". Rating 100mA-100 Vdc max., 1 Amp - 10V DC max., 10 watts max. 30" wired leads. Overall mounting depth 1.7".