Lew Electric's Garbage Disposal Air Button Disposal Switch is a leader in air buttons. The round button is 1.75" in diameter and is a real brushed stainless steel metal, it is beautiful and durable. The push button activates the garbage disposal by sending air to the power controller. This meets the code and is the only safe way to install a switch on a countertop by not using electricity. Press the button to turn your disposal on, then press it again to turn it off. This is a SINGLE unit kit.