Review on ⚡ Cooper Bussmann NO 263 Number 263: Reliable and Efficient Electrical Protection Solution by Timothy Barnes

These fit on either end of a 2" cartridge fuse to fit in the space reserved for the 3rd gear -Inch larger diameter fuse is provided. cartridge safety. The fit is snug so it takes some effort to get it fully on. On the inside there is an edge that prevents slipping. I installed a higher efficiency AC unit and couldn't find fuses small enough to fit the recommended fuse size in the old 3" length. This solved the problem without an expensive and unnecessary fuse box. Substitute. Shipping was expensive, but the overall price was right.