The product is a lot of 40 Bussmann fuses in 14 packs, ranging from 500mA to 20A with a maximum amperage of 30A. These tube-style fuses are suitable for use in walls, both indoors and outdoors, and are designed for thermal overload protection. Made of brass and glass, they offer time-delay/slow-blow (T) fuse speed and are rated for AC current. With a single pole design and originating from the United States, these fuses from the ABC, AGC, GDC, GMA, and MDL models by Bussmann are a reliable choice for electrical equipment and supplies in a variety of industrial settings.