Blue Sea Systems Standard Cablecaps 4005Red & black caps insulate battery terminals with added adapter terminals & 1 thru 4 AWG battery cable lugs to prevent accidental grounding. Standard CableCap insulators Includes 1 red and 1 black PVC cable cap For batteries with automotive style lead battery posts with added clamp-on marine terminals with threaded posts Accommodates 4, 2, and 1 gauge cable sizes Each cable cap is designed for use with a single battery cable Meets applicable ABYC and US Coast Guard requirements