Specification: Height: 80MM Length: 80MM Width: 54MM Max AMP: 25A Volt: 12, 24, 32V DC Electromagnetic Auto Float Switch Our float switch has an innovative electromagnetic design, it's also enclosed to help eliminate large debris from reaching the switch's mechanism which can cause damage. It can be used with any manual bilge pump up to 25AMPS. The quick attach base offers simple maintenance, 2 screws are included for easy set up. It's mercury free.