Specification Type : 250 stems density polyolefin fastener Width: 1" Backing Attachment: Black , pressure sensitive very high bond VHB acrylic adhesive, Designed to bond to metals, glass and high surface engery plastic Operating Temperature: -20°F - 158°F continuous , -20°F - 200° intermittent Features: UV Resistant. Plasticiser Resistant. 3M Dual Lock Reclosable Fastener SJ3560 has a clear acrylic adhesive on the back of a clear polypropylene reclosable fastener with 250 stems per square inch and 0.23 inch engaged thickness. 3M Dual Lock Reclosable Fastener SJ3560 has a closure life of 1,000 times.