Dual Function Switch, 2 A Form Reeds, 3/4" Recessed Steel Door, 4 C Jacketed Cable (UL 10C Fire Rated)Description 2 A Form Reeds Switch, 3 4" Recessed Steel Door, 4 C Jacketed Cable (UL 10C Fire Rated) 10 pack This AA switch can be used in numerous security applications where you need to isolate input from two different pieces of equipment that require a signal from the same source. The Combo Series switches are dual function reed contacts that monitor two separate functions. By combining two reeds in one package, two A forms in this case, we offer