This is a 3M VHB Tape 4949, a black, general-purpose acrylic adhesive tape with a firm foam core. It is 0.045 inches (1.1 mm) thick and features a polyester backing with a silicone/rubber blend adhesive. Designed for permanent bonding, it can replace rivets, welds, and screws, offering high strength, durability, and design flexibility with its viscoelastic properties. The tape comes in a roll measuring 1 inch by 5 yards, suitable for various industrial and construction applications. Custom widths or configurations are available upon request.