Momentary push-button switch is rated 5 amps at 12 volts DC. for operating fog horns and sirens. Plastic button and chrome plated brass shell and mounting bracket. Overall length is 25/8" Diameter is 11/2". Mounting centers are 21/16". Alternate part numbers: Sierra 8-MP39300, SIE_MP39300, SIE-MP39300, SIEMP39300, 47-MP39300