R30 8-1/2 x 23 x 48" KF INSUL CATH 76.67 SQ. FT. | R-30 High Performance Fiberglass Kraft Faced Batts
8-1/4" x 23" x 48"
10-pcs. per bundle
76.67-Sq. Ft. per bundle
"R'' stands for resistance to heat flow. The higher the R-value the greater the insulating power.