300 PACK 22-16 Gauge #8 Stud Insulated Vinyl Ring Terminals 100% Tin Copper Core,22-16 Gauge #8 Stud Insulated Vinyl Ring Terminals 100% Tin Copper Core 300 PACK,These have the highest grade copper cores for maximum conductivity with an electro-tin plating to resist corrosion, Made from 100%25 tin plated copper core, Vinyl insulation resists deformation when crimped and will hold up to higher temperatures.100% Tin Copper Core 300 PACK 22-16 Gauge #8 Stud Insulated Vinyl Ring Terminals.