12" Inch MC4 to Bare wire Adapter Cable Set one black one red #10 solar cables with MC-4 connectors and tough 1000 VDC XLPE innsulation one Set of 12" Cables with a MC4 connector on one end and bare wire on the other High Quality #10 AWG PV-Wire, one red and one black with tough 1000 VDC XLPE insulation Cross-linked polyethylene (XLPE) insulation per UL-854, UL-4703 and UL-44 Ideal for connecting solar panels with MC-4 connectors to charge controller or combiner box cable diameter .24" easy to use adapter kit for solar cable adapter kit