3M Dual Lock SJ3551CF. 3M Dual Lock Reclosable Fastener SJ3551CF is a general purpose acrylic adhesive on the back of a black, polypropylene re closable fastner. 3M Dual Lock Re-closable Fastener SJ3551CF is a general purpose acrylic adhesive on the back of a black, polypropylene re-closable fastener.
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