World Champion ACER Racing 18 Gauge Silicone Wire, Super Flexible multi stranded copper wire.  50 Feet total (25 feet (635 cm) black and 25 feet (635 cm) red wire). Super low electrical resistance for a highly efficient connection.  If you need 16 Gauge, 14 Gauge, 12 Gauge, 10 Gauge or 8 Gauge wire we also sell those sizes in our eBay store.