Morris Products 11312 Ring Terminal, Nylon Insulated, Red, 22-16 Wire Size, #4 Stud Size (Pack of 100) Nylon Insulated Ring Terminals - Nylon Insulated Ring Terminals for Electrical Terminations. Ring Terminals are Nylon Insulated Color Coded insulation for easy identification Manufactured from High Strength Electrolytic Copper Alloy Electro-Tin Plated for corrosion resistance