TIN-COATED PURE COOPER: Kohree 10 AWG solar extension cables are made of pure copper with tin coating, which provides good conductivity and corrosion resistance and oxidation performance. Can greatly extend the service life of solar panel cables. | MINIMIZE POWER LOSS: The 10 AWG solar wire has the largest diameter of the three typically sold sizes (10/12/14 AWG), can minimize the power loss in your solar panel system. The Kohree solar extension cable offered in this listing is 10 AWG. | 30FT SOLAR PANEL CONNECTOR KIT: Both 6pcs solar panel wires with only one solar connector at one end for the solar panel, and bare on the other end for the solar charge controller with the red one (female) and black one (male). | STABLE LOCK&OPEN DESIGN: Extends and locks were built into solar extension wires, and hard plastic solar panel connectors were offered extremely at each end. The connector is stable and safe with the built-in lock, which is more secure and durable to use outdoors. | WEATHERPROOF&LONG LIFESPAN: The IP67 waterproof solar cable wires are designed to withstand extreme heat and cold (-40℉ ~ +194℉) and 6 mm² is thick enough to push current and voltage (DC: 1.8KV; AC: 0.6~1KV), durable with more than 31-year lifespan for outdoor use.