SHURFLO Standard Automatic Float Switch - 12/24 VDC. These Pump Parts & Accessories by SHURFLO include a 3'' diameter float that will sense water and will retort accordingly. The SHURFLO 12/24V Float Switch mounts in the bilge area which collects water and will rise to let the pump in. The long-life non-mercury Shurflo Standard Automatic Float Switches provide the ultimate in reliability for your boat. Lastly the switches have a solid-contact double-throw action which will make the pump turn on and off more efficiently. Additionally the switches will normally reset to the low-water level condition if that condition is maintained. For a reliable way to make sure your boat doesn't sink choose the Shurflo Standard 12/24 VDC Float Switch. Specifications for SHURFLO Standard Automatic Float Switch: Manufacturer: SHURFLO Color: Black Voltage: 24 volts 12 volts Features of SHURFLO Standard Automatic Float Switch 3' Tinned Wire Assembly Non-Mercury Remote or Direct Mounting Ignition Protected 3 Year Warranty Package Contents: SHURFLO Standard Automatic Float Switch SHURFLO 359-111-30: Standard Automatic Float Switch - 12/24 VDC