AGC Glass Automotive Fuses, are utilized to provide short circuit protection and overcurrent protection in primarily 12 volt electrical systems. AGC Fuses are commonly found in older and vintage automobiles, custom electrical installations, and also in panel mount fuse holders found in both automotive and marine vehicles. Glass fuses are basically a small glass tube with a fuse element inside. The ends of the tube are capped with a metal cap that is connected to the fuse element. The clear glass tube makes it easy to see the condition of the fuse. The amperage rating is also stamped into the metal ends. Available fuse amperages are 5 amp, 7.5 amp, 10 amp, 15 amp, 20 amp, 25 amp, and 30 amp. Fits all OEM and aftermarket AGC fuse blocks and fuse holders.