1" x 15' Black 3M MP3541/42 Dual Lock™ Mini Pack Fasteners. Fastens heavy items creating a more permanent bond. Rigid plastic stems interlock for hundreds of closures. Rubber based adhesive on back of a polypropylene, reclosable fastener. 15 feet of usable product. 2 rolls per pack. Designed to bond to many plastics, powder coated paints and other low surface energy materials. Handles temperatures up to 120 degrees F.