The shells are designed to withstand temperatures up to 221(deg)F (105(deg)C). Highland color-coded wire connectors are UL Listed, CSA Certified, and work equally well with either solid or stranded wire. H-29 and H-30 connectors are rated to 300V. H-31, H-33 and H-35 connectors are rated to 600V (1000V in signs and lighting fixtures).

Highland Wire Connectors make it quick and easy to match the right connector to the size of the wire.