20557 Jumper Cable Clamps Ends, Red Black Fits Universal ProductsOne New Aftermarket Replacement Set of Jumper Cable Clamp Ends Red and Black, Extra Heavy Duty This 2 piece set of replacement jumper cable clamp ends (booster cable ends) provides a reliable, secure connection for jump starting tractors, combines, and other agricultural and construction equipment. The color coded clamps red for positive (+) and black for negative ( ) feature a zinc plated finish for corrosion resistance and extra heavy duty