100-foot solid 12-Gauge UL listed indoor copper building wire. 2 conductors with ground. Use in both exposed and concealed dry locations, and in air voids of masonry block or tile walls which are not subject to excessive moisture.Not for use in direct burial applications. Yellow 30 mil-thick PVC jacket. Designed specifically for use as an internal building wire, above ground and in dry locations only. Each finished package displays with Underwriters Laboratories Inc. label indicating listing under the standards.