3M™ Dual Lock™ Reclosable Fastener MP3551/MP3552 is a general purpose, acrylic adhesive on the back of a black, polypropylene reclosable fastener. 400 stems per square inch. .23 inch engaged thickness. Closure life 1,000.Features and Benefits:- Type 400 and 170 stem density polyolefin fastener- Designed to bond to metals, glass and medium to high surface energy plastics and paint- Markets: General Industrial, Speciality Vehicles, Transportation, Military, Packaging, Medical, Point of Purchase Displays, Exhibits, Electronics, Construction, Furniture, Maintenance Repair and Operations (MRO)- Applications: Attach Doors, Access Panels, Signs, Cushions, Headliners and Display Components