3M™ Dual Lock™ Reclosable Fastener SJ3221 is a black, polypropylene reclosable fastener with a pop-in square top, a single disk base and a stem density of 250 stems per square inch.
3M™ Dual Lock™ Reclosable Fasteners Pop-In Parts attach without the use of pressure sensitive adhesive, and come with a variety of bases that can be inserted into holes of precise dimension. They are easy to install and require no special equipment or skills.
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