The Ferraz Shawmut 1.5A Fuse ATMR1-1/2 is a pack of 20 fuses with a maximum amperage of 20A. These fuses are designed to protect electrical circuits from overcurrent situations, ensuring the safety and proper functioning of electrical systems. The Ferraz Shawmut brand is known for its quality and reliability in the industry, making these fuses a trusted choice for various applications.