Review on MaxxHaul 70086 7-Way Round to 4-Way Flat Trailer Plug Adaptor: Flexible Cable, Extendable up to 36 Inches, Red by Gregory Castellanos

They might not be the heaviest cables but they work great for the purpose. Coil memory and recoil are maintained under the hot Florida sun and with multiple uses. I used it as a pigtail to connect the 7 pin end to the trailer as regular pigtails are not available with winding. It worked great for this purpose, the wires were colored intuitively. The only problem (which is probably to be expected) is that not all of the 7-wire wires come from the 7-wire end. Instead you have the standard 4 wires, which is good if you don't need brake wiring. It's a bit shorter than I was hoping for but that was my fault, I didn't realize the product description said 18 inches fully extended.