Narva Glass Fuse 3AG 3 Amp (Pack of 5) - 52303BL.

3AG: This indicates that the fuse follows the 3AG fuse standard, which is a common type of glass fuse with a cylindrical shape.

The Narva Glass Fuse is composed of a glass cylinder that has two metal end caps and a thin wire in between. The thin strip is designed to fail when the current passing through it is too high.