Blue Sea ST Blade Fuse Block w Negative Bus and Cover-6 Circuit This Blue Sea Fuse Block consolidates branch circuits and in-line fuses. The Blue Sea ST Blade Fuse Block offers a space saving and cost effective solution to adding circuit protection when there are limited available circuit breakers on the distribution panel. Includes a cover that satisfies ABYCUSCG requirements for insulation. Cover features an easy to open push button latch, storage for two spare fuses, and label recesses that a