350 MCM-12 AWG Polaris EDGE EPDM Rubber Pedestal Connector Splice. Polaris Edge are manufactured from high strength 6061-T6 aluminum alloy, providing premium electrical and mechanical performance. Radial tipped set screws reduce conductor strand damage, and the range taking design allows for many sizes and types of conductors- all in one connector. Encapsulated in EPDM rubber with a nominal thickness of 125 mils. Abrasion and chemical resistant. UV resistant. Will not support combustion. UL Listed 486D Wire Connector. AL9CU. Cold temperature rated to -45 degrees C, rated 600V, 90 degrees C. For use with copper and/or aluminum cables.