Aluminum Compression Splice, Tin Plated, No. 1 American Wire Gauge (AWG), 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 plugs and Panduit and specified competitor die index numbers marked on barrel for proper crimp die selection, Tin-plated to inhibit corrosion, Internal solid center prevents over-insertion of conductor, UL Listed and CSA Certified to 35 KV and temperature rated to 90 Degrees Celsius when crimped with Panduit and specified competitor crimping tools and dies.