Blue Sea Systems ST CLB Circuit Breaker Block - 6 Position w Negative Bus The Blue Sea Systems ST CLB Circuit Breaker Block uses a compact, snap-in-place CLB resettable circuit breaker which makes breakers as easy to install as a fuse. Includes a clear insulating cover with square format label recesses. Features Quick connect clips allow circuit breaker to snap easily into place Tin-plated copper buses and screw terminals Cover satisfies ABYCUSCG insulation requirements Easy to open clip on cove