R38 10-1/4 x 23 x 48" KF CATH INSUL 53.66 SQ. FT. | R-38 High Performance Fiberglass Kraft Faced Batts
10-1/4" x 23" x 48"
7-pcs. per bundle
53.67-Sq. Ft. per bundle
"R'' stands for resistance to heat flow. The higher the R-value the greater the insulating power.