World Champion ACER Racing 16 Gauge Silicone Wire, Super Flexible multi stranded copper wire.  20 Feet total (10 feet (304 cm) black and 10 feet (304 cm) red wire). Super low electrical resistance for a highly efficient connection.  

If you need 14 Gauge, 12 Gauge, or 10 Gauge wire we also sell those sizes in our eBay store.