3M™ Dual Lock™ Low Profile Reclosable Fastener SJ4570 is a clear low profile reclosable fastener that is thinner and more flexible than other reclosable fasteners. 300 LSE adhesive and 705 pins per sq. inch Amazingly thin and reclosable, yet strong, 3M™ Dual Lock™ Low Profile fasteners are thinner and more flexible than other reclosable fasteners. SJ4570 is backed with 3M™ 300 LSE Laminating adhesive, giving it an excellent bond to many substrates i