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Home > 3M Dual Lock Reclosable Fastener System SJ3551, 1"X50 yd., Black, 400Stm
|3M Dual Lock Reclosable Fasteners offer advanced closure alternatives to zippers, screws, snaps, hooks, bolts and more. The Dual Lock system consists of continuous strips of plastic mushrooms protruding up from the backing. When 2 strips are pressed together, the mushroom heads interlock, forming a releasable mechanical bond. There are three types of these fasteners 170, 250, and 400 - referring to the approximate number of mushrooms per square inch. They can be mated in the following combinations of increasing closure strength: Type 170 to Type 250, Type 250 to Type 250, Type 170 to Type 400 and Type 250 to Type 400. (Type 170 will not stick to itself, and Type 400 to Type 400 is essentially a permanent bond.)|
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