Black, polypropylene reclosable fastener with white acrylic adhesive on a clear polyethylene film liner with red 3M logo, 400 stems per square inch, 0.22 in (5.6 mm) engaged thickness. 3M ™ Dual Lock ™ Reclosable Fasteners have been used extensively in transportation, electronics, business equipment, machinery, medical and sign and display markets. When the mushroom-shaped stems interlock, tensile strength is high enough to repla