3M Dual Lock MP3541/42 black hook & loop tape comes in a 1 in width, uses a rubber adhesive. These products are generally considered "hook & loop" products. While the traditional system is that of a hook and a loop some of these products also use an interlocking mushroom like head. This particular 3M item is the mushroom hook side with a density of 400 stems/in². This is an adhesive based hook & loop tape.