3M™ ITCSN-1500 48" length Heat Shrink Tube.   3/0 AWG-400 kcmil, expanded/recovered I.D. 1.50/0.50 in. These heat shrinkable cable sleeves:

• provide reliable performance for electrical splices, connections and terminations
• provide mechanical and environmental protection
• cross-linked polyolefin
• highly split resistant and fast shrinking to provide rapid installation.
• cut-to-length sleeves
• standard factory-applied adhesive/sealant.  
• Minimum order for 20/case price.