One-Hole Lug Compression Connector Barrel Size Long Color Code Red Die Code 21 Tongue Angle Straight Tongue Width 0.41 in For Conductor Material Copper For Stud Size #10 For Stranded Copper Wire Size - Maximum 10 AWG Inspection Hole No Hole Center to Center Not Applicable Material Aluminum Maximum Operating Temperature 194 Degrees F Maximum Voltage 35 kV AC Standards CSA Certified UL E9809 Number of Holes 1 Barrel Outside Diameter 0.27 in Connector Type Straight Barrel