Nominal cross-section: 0.14 in (3.5 mm) 2 Stud diameter: 4 in (4.3 mm) Standard: RF-3.5-4 Material: Terminal: Copper (tin plating) Insulator: PVC Rated voltage: 300 V; Operating temperature: -4 °F (-20 - 75 °C) (but within the rated temperature range of electric wires. .63-4 0.02 inch (6 mm) x 10 pieces.