KNAUF INSULATION R38 12" X 24" KRAFT FACED FG BATT 64 SQFT #5001491 | R-38 Fiberglass Kraft Faced Batts
12" x 24" x 48"
8-pcs. per bundle
64-Sq. Ft. per bundle
"R'' stands for resistance to heat flow. The higher the R-value the greater the insulating power.