"OWENS CORNING" INSULATION *For use with 2 x 6 walls and floors with 24" on center studs *R19- 6 1/4" thick *23" x 39 ft. 2" long *1 piece per package *75.07 square feet per package *Kraft faced *Continuous roll - Ecotouch *Energy Star *Green Guard certified *Formaldehyde free *Polybagged