I won this booster cable set and have never taken it out of the box. It is heavy duty (see the link with Warn below) and consists of a 4' battery connector cable plus the 16' booster assembly. Warn sells it for $162.89 Asking $100, and I live in Berkeley, CA
Those are nice cables and the quick connects make it much more easy to jump start a SMB off a different vehicle. Of course they work well if you need to jump somebody else too. We use em at work.
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2006 Ford 6.0PSD EB-50/E-PH SMB 4X4 Rock Crawler Trailer
Yes, they sold. What a pleasant experience. I am not used to this online selling stuff, and it worked! The cables are huge and look very heavy-duty. I'm sure they are wonderful for the owner who will install them.