The 3M Dual Lock Reclosable Fastener SJ3560 is made of transparent polypropylene. The smooth back features a clear acrylic adhesive, while the top has 40 mushroom heads per cm², and in its closed state, the flexible fastener is 5.8 mm thick. Our flexible fastener retains at least 50% of its original tensile strength after 1,000 open-close cycles. The 3M Dual Lock fastener system has been successfully used by professionals in the industry for years. This self-adhesive high-tech system can be used for temporary attachments of various items such as power strips, tools, picture frames, and more. The single-component fastener can be opened and closed up to one time.