Master MAXI® Fuse Block for 10 AWG - 4 AWG Wire (100A Maximum) Our ultra-compact Maxi® Master Fuse Block is easy to install and allows you to accurately fuse your amplifier with a reliable, genuine MAXI® fuse. OmniSert™ captured-wire receptacles accept various size wires from 10 AWG to 4 AWG, without the need for adaptor sleeves. Forged and machined brass construction with marine-grade stannum plating. A high-temperature polycarbonate base and cover provide insulation and protection. Requires one MAXI® Fuse, appropriately rated for the equipment being connected. These are sold separately. Fuse can be pulled and inserted without removing the cover.