The cables are custom made to your specified length out of SAE SGT, SGX or Marine cable. The car companies are struggling to keep the weight and cost down so they skimp by using the smallest wire that will do the job. We think that a better cable will help the car start in extreme conditions or when the starter or battery are getting weak. Therefore, we build then thicker and heavier than the cheap stuff used by the factory or local parts store cables. (We can also make small cables to match factory stock on request for customers who want accurate restorations). Note the size difference between the parts store cable and the 2/0 gauge CustomBatteryCables cable.