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 top, it is beautiful and durable (the main body is made out of plastic). The push button activates the garbage disposal by sending air to the power controller. This meets code and is the only safe way to have a switch installed in a countertop by not using electricity. Simply press the button to turn your disposal on, then press again to turn it off.