1" x 150' Black 3M SJ3550 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. 75 feet of usable product. 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.