Inverter Fuse Blocks are extra heavy duty DC-rated fuses with 'slow blow' functionality. Includes mounting block, fuse and protective cover. The Class-T fuses range from 110 to 400 amps. One block size fits all fuses and the wiring range is #6 to 4/0. Insulated polyester reinforced polycarbonate base5/16" studs or optional universal terminal lugsTransparent protective coverClass-T fuses