Durable and secure, 3M Dual Lock Reclosable Fastener MP3551CF/MP3552CF has exceptional strength through its interlocking mushroom-shaped heads, providing up to 5X the tensile strength of typical hook-and-loop products. This trial bag contains Type 400 and Type 170 stem densities, which can both mate to each other or to Type 250. 7100276500 - 00068060002952
