Safety-type wire joints Shell material : Nylon 66, 94V-2, certificated agree, by UL Usage: Peel the coat of wire, then insert to tube, use pincers to fix them. Feature: Nylon shell, long copper tube, easy to conduct electricity and hold wire tightly. ITEM.NO. HDS-Q3 HDS-Q4 HDS-Q5 HDS-Q6 HDS-Q8