Blue Sea Systems 4 Circuit Terminal Block The Blue Sea Systems Terminal Block features a closed black design that completely insulates power from the mounting surface. Features Each screw pair is one isolated circuit Jumpers allow creation of common circuits Phenolic base material Nickel-Plated brass bus material Specifications Circuits 4 Maximum Voltage 600V ACDC Continuous Rating 30A Screw Size 8 Weight 0.17 lbs California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Oth