Rule Plus Float Switch w/Fuse Holder Rule-A-Matic. It features highly abrasive resistant marine grade wire and a built-in test feature. A standard bilge pump operates by a control switch that senses water and activates the pump. Rule's Float Switches offer outstanding performance with extra-large float chambers for increased buoyancy and detachable mounting bases that make them easier to install and remove for cleaning and inspection. All models are suitable for pumps that draw up to 20A except the Model 35 Rule-A-Matic which is suitable up to 14A. Year after year the Rule-A-Matic Float Switch has been the switch of choice for boaters around the world. Rule Industries latest design now includes a removable base for easy cleaning and servicing a mercury-free snap-switch tested to over one million cycles and marine-grade blocked wire. Specifications for Rule Rule-A-Matic Plus Float Switch w/Fuse Holder: Manufacturer: Rule Color: Black Voltage: 32 volts 24 volts 12 volts Features of Rule Rule-A-Matic Plus Float Switch w/Fuse Holder Volts: 12/24/32 Package Contents: Rule Rule-A-Matic Plus Float Switch w/Fuse Holder Rule 40FA: Plus Float Switch w/Fuse Holder Rule-A-Matic