The product is a lot of 12 Bussmann fuses, consisting of 2 boxes of 30 amp fuses and 1 box of 20 amp fuses. They are screw-in plug fuses with a maximum amperage of 20A, suitable for interior use. The fuses are time-delay/slow-blow with overload protection and tamper resistant resistance properties. They are compatible with any room and provide one-time use for 1-10 circuits. This product offers reliable electrical protection for various industrial and commercial applications.