S&C Fault Tamer Fuse Cartridge 20 AMP Standard 527020 NIB USA 282L.
 
See the last picture for what these fuses go into. Look at the E on the picture for the application.
 
This S&C Fault Tamer Fuse Cartridge is a reliable solution for any commercial electrical application. With a maximum amperage of 20 AMP and a current type of AC, this electrical fuse is designed to provide superior performance and protection against short circuits. The cartridge-type high rupturing capacity (HRC) fuse type ensures that your electrical equipment and supplies are safe and secure. This item is new in box (NIB) and is made in the USA. It's perfect for use in a variety of industries, including business and industrial settings.