4906-050F QuickCable 6 GA Stackable and Locking Crimpable 3/8" Stud Terminal (50 PCS) - Quick Connectors are the only battery connectors that exceed SAE standard, are UL listed and are made in North America.  Made of cast copper and tin plated for added conductivity and corrosion resistance, these connectors have 25 times better conductivity than the SAE standards J163 and J1811 require.

Warning: This product may expose you to chemicals including lead which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov