- Southwire type XHHW-2 aluminum conductors are Alumaflex™ brand AA-8000 series aluminum alloy, compact stranded. The insulation is an abrasion, moisture and heat resistant SIMpull™ thermoset crosslinked polyethylene. Conductor sizes 6 AWG and larger are listed and marked sunlight resistant in all colors. Available in black, white, red, blue, brown, orange, yellow, purple, gray, green. Some colors are subject to economic order quantity.