Remington Industries 22UL1007STRKIT UL1007 22 AWG Gauge Stranded Hook-Up Wire Kit, 300V, 0.0253" Diameter, 25' Length Length: 25 Feet Each Insulation: PVC (0.016" Thick) Type: UL1007 Stranded Wire (7/30) Color: Black, Blue, Green, Red, White & Yellow Voltage Rating: 300 Volts Item is made of copper and each strand has a tin coating that is silver in color