Morris Products 10010 Ring Terminal, Vinyl Insulated, Red, 22-16 Wire Size, #4 Stud Size (Pack of 100) Vinyl Insulated Ring Terminals - These Wiring Terminals are Vinyl Insulated. Ring terminals are Vinyl Insulated Color Coded insulation for easy identification Manufactured from High Strength Electrolytic Copper Alloy Electro-Tin Plated for corrosion resistance