Features: 1.When the water level reaches 2in, the floating switch automatically opens. When the water level drops to 3/4in, the floating switch automatically disconnects. 2.Heavy duty flow switch is designed for the toughest applications. 3.For use with pumps drawing up to 20 Amps. Use with the recommended size fuse for the pump to which it is connected. 4.The work is more stable and it can connect various yachts and boats. 5.The switch utilizes a mercury?free rolling ball mechanism to prevent certain switches from quickly turning on / off. Specification: Condition: Brand New Item Type: Float Switch Material: ABS Color: As Pictures Shown Model: NMFS11 20 20AMP 12-24-34V DC Maximum Amps 12V: 20A Maximum Amps 24V: 10A Maximum Amps 32V: 8A Wire Length: Approx. 1m / 3.3ft Wire Gauge Size: 18 Product Size: Approx. 5 x 1.9 x 2in Ignition protected Mercury free PackageList: 1 x Float Switch1 x User Manual Note: 1. Keep all wire connections above the highest water level. Wires should be sealed with a waterproof marine sealant to prevent wire corrosion. 2. Do not use with 110V applications 3. Designed for fresh water or sea water only.