Hook-Up Solid Wire Kit, Six 20 gauge wire spools, 25 ft. each, Assorted colors: Red, black, green, yellow, blue, white, 6 spools contained in a cardboard dispensing box, which keeps hook-up wire neat and clean. The insulation is PVC .010" and has a temperature rating of -55 degrees C to 105 degrees C. It has a voltage rating of 300 Volts and is resistant to water, oil - also flame retardant.