I bought these because I needed to make a Y-harness for some devices so I didn't have to remake the "factory" wire. It worked great. As a bonus I needed another wire for a 2 wire harness which I tried with this 4 wire harness and the 2 wire connector fits perfectly with half the wire. The value is good, I guess "thickness". that's great, whatever that means. I have no idea how "transparency" relates to a power extension cord, so I left that unrated.