The Johns Manville B-777 Multi-purpose Fiberglass Insulation is a high-quality insulation product designed for various applications. This unfaced insulation is made of durable fiberglass material with an R-Value of R7, providing efficient thermal protection. The 16″W x 48″L x 2″ thick size makes it easy to install in different areas, and the white color adds a clean look to any environment. Proudly made in the United States by Johns Manville, a trusted brand in the industry, this insulation is a reliable choice for insulation needs. Thanks for looking.