Aluminum Compression Lug, 1 Hole, No. 6 American Wire Gauge (AWG), 1/4 Inch (6.4 mm) Stud, Manufactured from high conductivity thick wall wrought aluminum, Factory pre-filled with joint compound and sealed with easy pull-out end plug to inhibit corrosion, Color-coded end plug and Panduit and specified competitor die index numbers marked on barrel 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.