Copper Compression Metric Lug, 1 Hole, 10 millimeters squared Wire, M10 Stud, Inspection window to visually assure full conductor insertion, Tin-plated to inhibit corrosion, UL Listed, UL Recognized, and CSA Certified to 35 KV and temperature rated to 90 Degrees Celsius when crimped with Panduit tools and dies, Product information marked on connector for selection and installation, Rounded tongue convenient for use in tight spaces, Internally beveled wire entry for fast and easy installation.