Installing a car audio amp or marine stereo? Protect your system with this high-quality AGU fuse holder kit! It includes the fuse holder itself, which accepts standard AGU-style fuses and is designed for thick 4 to 8 gauge power wire. Plus, you get a bonus 5-pack of 100-amp AGU fuses (some listings say 125A, check details). The holder is an in-line type that installs close to your battery, and it's built to be waterproof, which is great for under-hood or marine use. This setup from APO-12VMAX is brand new and ensures that if there's a power surge, the fuse blows before your expensive amplifier does. It's a crucial safety component for any serious audio installation. Don't skip the fuse – it's cheap insurance for your gear. Get everything you need in one package for a safe and professional-looking install.