Material: Silicone rubber+3.3mm² High-purity oxygen-free Tinned Copper wire Total 50 feet:2 Conductor Parallel Wire ,Black and Red each color 25FT Voltage Rating: 600 Volts; Rated temperature: -60 - + 200; Bear Current:30A ;12 Gauge silicone wire - super flexible 680 strands of 0.08 mm Tinned copper wire - Highly efficient - Super low impedance for a highly efficient connection. Conductor: High purity Stranded oxygen-free copper with tin-plated, specification features high conductivity, low resistance and soft, can be bent arbitrarily, easy to welding, stripping, crimping terminals,connect,cut. Widely used for Car,batteries,lamps,household appliances,electric heating appliances,model planes,model cars,model ships,meters,instruments,motor lead wire,digital fields and led strip lights.