R38 12 x 24 x 48" KF INSUL 64 SQ. FT. was #990425 | 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.