A variety of fuses that I've found. One on the right is some sort of plastic with brass ends. Next is a compressed paper tube with brass ends and third is another compressed paper with brass and aluminum ends. These have a copper wire as the fuse inside the protective tube

The last one is all brass and copper . . .

This is what's known as a 'disconnect blade' - where the utility opts to use a cutout as a circuit switch.[id=98971744] This would be where the company would want to be able to section off a portion of a feeder for maintenance or repairs without having to break out jumpers at a corner pole. Dave Dahle

On the very left is part of another style, similar to the second from the right. I didn't think to take a picture before I took it apart. I use this particular fuse in some of my art and am looking for more of the exact same. If your into dumpster diving and have this style, I'm interested.