This item is a 5 pack of 40 Amp AGU Fuses with gold plating (for maximum corrosion prevention) used to protect your system. They are also known as glass 12 volt glass fuses and are used for a variety of purposes. They have a universal application but are very popular in automotive and car audio. For over 20 years, IMC Audio has been producing aftermarket accessories for Car Audio such as wire harnesses, antenna adapters, power and ground wire, distribution blocks. Offering a 1 year warranty on most products, IMC Audio is confident in their quality of products. IMC Audio offers a range of products from antenna adapters to amp kits for amplifier installation to 12 volt glass fuses. IMC Audio offers AGU fuses from 20, 30, 40, 50, 60, 70, 80 and 100 Amp. In addition to AGU fuses, they also provide ANL fuses (80, 100, 120, 125, 130, 150, 200, 250, 300 Amp) , mini ANL Fuses (10, 15, 20, 25, 30, 40, 50, 60, 100, 150, 200, 250, 300 350 amp), ATC fuses, and Maxi fuses and fuse holders for each type of fuse.