These hook and loop fasteners are coated on the backside with a high temperature acrylic pressure sensitive adhesive designed to function over a range of temperatures (up to 250 degrees) and humidity. This adhesive is especially suited for attachment to bare metals and a variety of high surface energy adherends. We carry this in black only...You can mix and match the hook and loop - they are each sold seperately. This is a less expensive version of VELCROŽ brand fasteners.