JT&T Products (2016H) - 12-10 AWG 5/16" Stud, Vinyl Insulated Ring Terminals, Yellow, 12 Pcs. Vinyl Insulated Terminals have been PVC injection molded with funnel entry for fast, easy wire insertion Terminals have "V" groove serrations to provide maximum contact and tensile strength after crimping JT&T's terminals are constructed from pure copper (Alloy 110), annealed & electro tin plated Insulator sleeve is color-coded for wire size and identification 12 Pcs. in a re-closable package