... 50y(45.7m) 3M Dual Lock Fastener Back To Back Velcro Tape SJ3550 Material: polypropylene Use: ... , 250 and 400) of these fasteners referring to the approximatenumber of stems per square inch.These ... from the adhesive. Application Designed to bond to metals, glass and medium to high surface energy plastics and ... as per customers request)1.3M VHB tape: Item number: 4905,4910,4914,4920,4930,4941,4945,4949 ...