25 foot length of 1/O AWG red battery cable made from 133 strands of true 21 gauge copper conductor wire covered in a durable, high temperature resistant red PVC insulation with a nominal outside diameter of 0.550 inches. Rated for use up to 60 volts, the 21 gauge copper stranding is highly conductive maximizing current flow while still being flexible. Ideal for connecting batteries, starters, amplifiers, and for solar use. Meets SAE J1127 specifications. Temperature rated from -50°C to 105°C (-58°F to 221°F). Made in the USA and RoHS Compliant.