Black, polypropylene reclosable fastener, rubber based pressure sensitive adhesive 170/400 stems per square inch, black foam adhesive and white polyethylene film liner, bonds well to high density polypropylene and polyethylene, 230 mil 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 replace