2" x 150' Black 3M SJ3552 Dual Lock™ Fasteners. Fastens heavy items creating a more permanent bond. Rigid plastic stems interlock for hundreds of closures. Acrylic adhesive on the back of a polypropylene, reclosable fastener. Type 170 stem density mates to types 250 or 400 but not to itself. 150 feet of usable product. Does not interlock with itself. Designed to bond to metals, glass vinyls, and medium to high surface energy plastics and paint. Excellent UV, moisture and solvent resistance. For indoor/outdoor use in temperatures up to 200 degrees F. Stems interlock with DK3M135 or DK3M120.