Enhance the organization and efficiency of your electrical systems with the 249-617 Marker Card for Fuse Block F21-F30. This essential accessory, part of the 249 series, features a sleek white design with bold black markings for easy identification. With a snap-on mating type, installation is a breeze. The non-stretchable marker is halogen-free and UL 94V-2 compliant, ensuring safety and reliability. Its 5mm width and vertical marking direction make it perfect for use with barrier strip jumpers and terminal blocks. Keep your connections clear and secure with this high-quality marker card.