EAVY DUTY LUGS - Made with thick gauge high quality copper, these battery lugs hold crimp very well. PREVENT CORROSION - A thin layer of tin will protect your copper lug terminals from corrosion caused by harsh environments. CAN BE CRIMPED OR SOLDERED - These battery lugs can be crimped or soldered to the wire cable ends depending on your preference. Sizes - 1.5mm to 400mm