Product Details: The Power Products 9” Top Stud Stackable Battery Jumper Cable keeps you Ready for the Road Ahead™, giving heavy duty Group 31 stud batteries a proper jumpstart, with the allowance of connecting multiple batteries. For a smooth start up for your truck, position tin plated copper lugs on the top stud to best boost the charge of the battery. This battery jumper cable is built with heavy duty requirements in mind, being corrosion resistant with superior conductivity, which boosts current transfer to your vehicle’s power system. FleetPride is your First Click in Heavy Duty®.