The Bussmann Fusetron FRN-R-40 Dual-Element Time-Delay Class RK5 Fuse is a high-quality electrical component designed for industrial and commercial use. This product is a set of four units, making it ideal for businesses that require a large quantity of fuses for their electrical equipment. With the trusted brand of Bussmann, customers can rely on the durability and performance of these fuses to ensure the smooth operation of their systems.