8 Gauge Brown Ground Wire 25 ft. OFC 23/0.25 x 7C,D. 6.5mm. 8 Gauge BLACK Power Cable - 25 Foot Spool Length with 6.5mm Cable Diameter. Economy OFC (Oxygen Free Copper) Wire - Finely Stranded OFC Cable. Insulated for Chemical and Heat Resistance Wiring - High Temperature Rating. Translucent "Matte" Insulator Coating - Extremely Flexible & Bendable Jacket. 8 AWG Electrical Grounding - Maintains Safe and Reliable Voltage Levels