Copper stranded battery cable with smooth PVC insulation is resistant to cracking, abrasion, weather, oil and acids.  Built to S.A.E. specification J-1127.  Temperature rating to 105ºC.  Cables are cut to length, then terminated with 3/8" tin-plated copper ferrules.  Black Switch to starter cables are 6 gauge, and red cables are 4 gauge.  $5 Shipping.