WirthCo Battery Doctor Die-Cast Push-On Starter Switch is a heavy-duty die cast push-on and momentary on starter switch. It has a water-resistant cover. This switch is rated for 16 amperes at 12 volts. For over 30 years, WirthCo has been a prime manufacturer of practical products for making life easier and safer. California Prop 65 - Warning, This product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.