WindyNation battery cables are assembled in the USA from USA manufactured WindyNation PowerFlex Cable! WindyNation's battery cables are excellent for battery bank wiring, inverter cables, grounding cables, RV wiring, car stereo wiring applications, golf cart wiring, and any other application where a highly flexible pure copper conductor is required. Our battery cables come with pre-attached cable lugs with 5/16" or 3/8" diameter mounting holes. Polyolefin heat shrink tubing is applied at the cable lug attachment point to form a protective seal.