This oiltight selector switch is engineered to provide long, trouble-free service in demanding industrial applications. It features a durable, one-piece casting with a heavy-duty plastic button to resist oil and corrosion. It also features a stainless steel spring, a neoprene actuator sealing ring, a neoprene gasket, and a chrome-plated lock nut. Non-Illum Selector Switch, 30mm, 600VAC, 3P