Southwire 25 ft. 6-Gauge Solid SD Bare Copper Grounding Wire 10638525 - The Home Depot
30' EA THHN THWN 6 AWG GAUGE BLACK WHITE RED COPPER WIRE + 30 8 AWG GREEN | eBay
New 40' EA THHN THWN 6 AWG Gauge Black White RED Copper Wire + 40' 8 AWG Green Electr Equipment and Supplies ACD-0771SU by InnaBest: Amazon.com: Tools & Home Improvement
6 Gauge Round Dead Soft Copper Wire: Wire Jewelry | Wire Wrap Tutorials | Jewelry Making Wire
Southwire 6-Gauge Solid Soft Drawn Copper Bare Wire (By-the-Foot) in the Ground Wire department at Lowes.com