The Blue Sea 5026 ST Blade Fuse Block - 12 Circuits is a Screw Terminal Blade Fuse Block. Positive distribution bus with #10-32 studCan be used for 24-hour circuitsModels available with or without a coverCover satisfies ABYC/USCG requirements for insulation, incorporates an easy to open push button latch providing easy access to fuses, storage for two spare fuses, and label recesses that accept Blue Sea Systems’ Small Format Labels for circuit identificationFuse blocks with covers include 20 write-on circuit labelsTin-plated copper buses and fuse clipsAccepts ring or spade type terminalsAccepts ATO® and ATC® fast acting blade fusesFuses sold separately