Owens Corning R 38 Unfaced Fiberglass Insulation Batts 10.25 in. x 15.5 in. x 48 in. (4 Bags) Traditional Style Vanities and metal Tapered web design and metal Tapered web design for extreme durability and resisting breakage Black and gold coating to help prevent rust and wear 3 Flats shank to reduce spin out in the chuck (on sizes larger than 3 16 in) Size markings on the drill bit shank for identifying sizes quickly Connectible accessory storage system to optimize storage space Patented bit bar design allows easy removal of bits and customizable placement Clear lid allows you to easily see contents at glance Item does not contain doors this insulation is easy to install and helps in regulating interior temperatures The Owens Corning R 38 Unfaced Fiberglass Insulation Batts are designed to deliver superior thermal and acoustic performance for home interiors