Stop in for a cup of coffee

Need to find some five conductor wire that has black rubber over it for one run the rest are just two, Kinda hard to find without buying 50' of it need around 3 feet.
What gauge? I'm guessing you need nice flexible stuff like SO cord.
I mentioned I had 4gauge for those ones that are frayed, don't know how long yet,but prob NFG anyway. This stuff is stranded, but not fine strand. So would start cracking wires soon. You need battery/welding cable with a lot of fine strands.