One-Hole Lug Compression Connector Barrel Size Standard Color Code Red Die Code 21 Tongue Angle 90 Degrees Angled Tongue Width 0.06 in For Conductor Material Copper For Stud Size 1/4 in For Stranded Copper Wire Size - Maximum 8 AWG Inspection Hole Yes Hole Center to Center Not Applicable Material Copper Maximum Operating Temperature 194 Degrees F Maximum Voltage 35 kV AC Standards CSA Certified UL E9809 Number of Holes 1 Barrel Outside Diameter 0.25 in