3M Direct Bury Splice Kits DBR/Y-6 and DBO/B-6 are used to electrically connect two or more pre–stripped copper wires and moisture seal the connection for direct burial. The kits include a 3M Performance Plus™ Wire Connector R/Y+ or O/B+ and a high impact, UV-resistant polypropylene tube prefilled with moisture-resistant grease. These Direct Bury Splice Kits are UL Listed for direct bury applications.