Compression lug. Flared barrel. Can be used with flex conductor class K, M and diesel locomotive. Flared entry prevents bent back strands when inserting fine strand conductor into barrel. Colour-coded barrels marked with die index numbers for proper crimp die selection. Inspection window to visually assure full conductor insertion. Tin-plated to inhibit corrosion. UL listed and CSA certified to 35 KV and temperature rated to 90°C when crimped with crimping tools and dies. Tested by Telcordia meets NEBS level 3.