3M™ Hook Fastener SJ3526N, White, 5/8 in x 50 yd, 4 Roll/Case. 3M™ Hook Fastener SJ3526N is one part of a two-part fastener solution designed to provide great durability for thousands of closures. With its high performance rubber-based pressure sensitive adhesive backing, this fastener allows for easy and convenient attachment to a variety of substrates, including plastics.