Building Wire, THHN, 1 AWG, Red, 500 ft/ CROSS-SECTIONAL SHAPE STYLE: 6 ROUND TEMP RATING: 190.0 DEG FAHRENHEIT OUTSIDE DIAMETER: 0.435 INCHES NOMINAL ALL CONDUCTORS STRAND QUANTITY PER CONDUCTOR: 19 SINGLE CONDUCTOR CONDUCTOR FORM: STRANDED ALL CONDUCTORS ROUND CONDUCTOR SIZE: 1 AWG SINGLE CONDUCTOR VOLTAGE RATING: 600.0 AC MAXIMUM RATED WORKING VOLTAGE SINGLE CONDUCTOR SPECIAL FEATURES: WEIGHT 170 POUNDS COLOR: RED 1ST POSITION SHIELD SOLID FIRST GROUP