E-KYLIN Pure Copper Battery Terminal Kit with Battery Corrosion Terminal Protectors - Marine Featured Coated Wing Nuts 17mm 200A Bronze marine battery terminal kit with 2 free anti-corrosion protectors. Inner diameter of + Pole: 19MM, - Pole: 17MM Suitable for boat ferry or other vehicles Max Current 200A. More conductive and efficient than lead battery terminal equivalents. New with Retail Package. For more More Battery Disconnect Switches, please search ASIN code: B01GMPPYYI This is universal battery terminal for inner diameter of + Pole: 19MM, - Pole: 17MM battery pile head. However, some minority models may be smaller size: Inner diameter of + Pole: 15MM, - Pole: 13MM of 11-13mm. Please measure your car battery pile head first, then decide to buy the right size.