The LCAF4/0-12-X Tin-Plated Copper Compression Lug, one-hole, standard barrel, has color-coded barrels marked with Panduit and specified competitor die index numbers for proper crimp die selection. An inspection window aids to visually assure full conductor insertion, and the tin-plate material helps to inhibit corrosion. UL Listed and CSA Certified to 35 KV and temperature rated to 90°C.