Copper Compression Lug, 1 Hole, No. 4 - No. 3 American Wire Gauge (AWG) Stranded Conductor (STR), No. 2 American Wire Gauge (AWG) Solid Conductor (SOL), Long Barrel, 3/8 Inch (9.5 mm) Stud, Long barrel maximizes number of crimps and provides premium wire pull-out strength and electrical performance, Color-coded barrels marked with Panduit and specified competitor die index numbers for proper crimp die selection, Enclosed barrel prevents corrosive material from entering barrel when used in harsh environments, Tin-plated to inhibit corrosion, UL Listed and CSA Certified to 35 KV and temperature rated to 90 Degrees C when crimped with Panduit and specified competitor crimping tools and dies, UL Listed and CSA Certified for wide wire range-taking capability when crimped with Panduit Uni-Die Dieless Crimping Tools, Tested by Telcordia - meets NEBS Level 3, American Bureau of Shipping Approved.