Blue Sea 2016 Dual PowerPost Cable Connectors - 2 X 5/16" 
Dual PowerPost Connectors
Designed for connecting high amp conductors
Includes one black and one red insulator
WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.