Zip Box Blue nonmetallic switch and outlet boxes from Carlon are the contractor's choice for residential, light commercial and manufactured housing projects. The line is designed for use with nonmetallic-sheathed cable in accordance with Article 370 of the current NEC. Zip Box Blue outlet and switch boxes are manufactured from high impact lightweight PVC with clean and easy knockouts. Many are available in single and multiple gang configurations with pre-installed nails for convenience on the job. The line is complemented by a full assortment of round and rectangular covers and adapter rings.