Copper Conductor, 600 V, 90 °C MAX - 40 °C MIN, 1/0 AWG to 1000 KCMIL. Sizes 1/0 AWG and larger are Sunlight Resistant and in Red. Class B compressed stranded bare copper per ASTM B3 and ASTM B8. Cross Linked Polyethylene (XLPE) SIMpull®. Single copper conductor with low temperature, moisture resisting XLPE (cross linked polyethylene) insulation. Standard sizes 1/0 AWG and larger utilize SIMpull ® technology, are Sunlight Resistant in all colors and packaging. This product meets the current RoHS requirements. No lead is added or used in manufacturing.