Push Button Switch, Sensor Switch, Overload Protector manufacturer / supplier in China, offering 19mm Touch Button Switch with Wire Waterproof Metal Push Button Switch Stainless Steel Metal Piezo Switch IP68 1no, Piezoelectric Underwater Momentary Latching Waterproof 24V 2A Normally Open 19mm Piezo Switch Without Light, 16mm Momentary Touch Switch Waterproof Flat Head Stainless Steel Piezo Button Switch with Wired Lead Touch Sensor Switch and so on.