3M Dual Lock™ Reclosable Fastener, 1/2"", Self-Mating, 50 yds, Adhesive, Black (SJ3540-1/2X50)

Dual Lock™ Reclosable FastenerBlack, interlocking mushroom-shaped heads (250 stem density per square inch) provide strong, reliable and durable fastening that can be opened and closed multiple timesMates with Type 170, Type 250 or Type 400 stem densities to provide different strength combinationsSynthetic rubber-based adhesive bonds well to a variety of substrates including low surface energy plastics such as polyethylene and polypropyleneStrong fastener secures with an audible snap, verifying closure