92 NBA 2 3M Resin Filled Cable Joint Kit, Straight Joint Type , 6 – 16 mm2. 3M, this cable joinign kit presents an easy-to-apply solution to many cable joining applications. The 3M cable jointing kit is used for 4-core cables with a cross-sectional area of 6mm² to 16mm². This kit is for nonshielded, polymeric, low voltage energy cables.