22-18 Gauge nylon insulated ring terminals. Insulation has a tapered entry to make wire insertion easier. Double crimp design provides extra pull strength and strain relief compared to traditional wire terminals. Nylon insulation resists deformation when crimped and will hold up to higher temperatures better than vinyl. Made from tin plated copper. Temperature rating of up to 221°F (105°C). Max voltage rating is 600 volts. Available in the following ring sizes: #4, #6, #8, #10, 1/4'', and 5/16''.