Blue Sea Systems Mega/Amg Safety Fuse Block 7721Blue Sea 7721 MEGA/AMG Safety Fuse Block Blue Sea 7721 MEGA/AMG Safety Fuse Block Ignition protected for installation aboard gasoline or diesel powered boats Sealed cover protects fuses from the harsh marine environment Insulating cover satisfies ABYC/USCG insulation requirements Cover breakouts allow wire access in any direction 300A maximum with 2/0 cable Accepts Blue Sea Systems Square Format standard or custom label Fuses sold separately