This 18 gauge TXL Automotive Primary Wire is a durable type of hook-up wire consisting of stranded copper conductors and a thin-walled, cross-linked polyethylene (XLPE) insulation. Choose this product today or browse more AWGs with Remington Industries.082" Diameter, 60 Volts The XLPE coating also protects the wire from abrasion, oils, chemicals, fuels, and solvents, while also remaining flexible enough to fit wherever it might be needed.We also offer 7 different spool sizes for your convenience.