The 3M™ Dual Lock™ Reclosable Fastener SJ354B is a robust and versatile fastening solution featuring black, interlocking mushroom-shaped heads (250 stems per square inch, approximately 38.75 stems/cm²). It provides a strong, reliable, and durable attachment that can be opened and closed up to 1,000 times before losing 50% of its original tensile strength. This fastener offers five times the tensile strength of typical hook-and-loop products. It closes with an audible snap, ensuring a secure connection. The pressure-sensitive, rubber-based adhesive provides excellent initial tack and forms strong bonds to various plastics (including polypropylene, polyethylene, acrylic, polycarbonate, and ABS), powder-coated paints, and metals. Designed primarily for indoor use, it also helps to reduce vibration.