The Pack of (4) Bussman Fustat Type S 4Amp Dual Element Time Delay Fuses are suitable for interior use and have a current rating of 4 amps. They feature a screw mounting style and are designed for horizontal or vertical orientation. These electrical fuses are from the brand Bussmann and have a tripping characteristic of Type S, making them current-limiting. The fuses are analog/mechanical control style with tamper-resistant resistance properties, ensuring safety in electrical circuits. Made in the United States, these fuses offer reliable protection for electrical equipment and supplies.