Thermo-Shrink® Underground Splice Kit, 4-1/0 AWGSplice Kit, Heat Shrink, 600V, Conductor Range: 4 AWG 1 0 AWG, Tubing Size: 1. 1" x 8. 0". For use Aluminum or Copper Cable in Direct Burial Applications. Global industries and the tradesmen that serve them rely on the forward thinking tools and technologies developed by IDEAL companies. IDEAL Industries touches all aspects of development , from construction safety to hand tools to power and light, IDEAL helps buildings come to life from tall iron