"ANJUREN Solar Panel Extension Cable (10 AWG Solar Wire, 3ft Black + 3ft Red)" is a pair of high quality MC4 cables. They looked very well made. The MC4 connectors were very securely attached to the cables. The connectors in the ports looked clean and shiny. The cable looked very high quality. They are 10 AWG (6.0mm^2) and rated at 1.5kV. They were pretty tough. I have nothing negative to say about this cable.