Fuse holders are an ideal option for housing your fuses while also offering fuse circuit protection. Fuse holders are available in different styles and amperages, this Sealed Standard Blade Fuse Holder is intended for use with 12 gauge wires and houses a 30A Blade Fuse. It is important to make sure the fuse amperage is accurate per its application or the fuse will not blow as intended and it will not serve as protection. The Sealed Standard Blade Fuse holder includes 12 gauge leads.