25.4 mm wide x 1 m long per roll, unpaired, only 0.5 m usable length when paired in pairs. The resealable 3M dual lock SJ3550 closure offers advanced closure alternatives to zips, screws, press studs, hooks, bolts and more. It offers greater design flexibility, faster product assembly, smoother and cleaner exterior surfaces and improved product performance in many applications. The fastener consists of continuous polyolefin strips with polyolefin stems with a mushroom-shaped top. The mushroom heads allow fasteners to slide easily on top of each other and position parts before snapping together, creating a firm fastener attachment. Open and close immediately by simply pulling the locking strips apart. The adhesive can stick firmly to metal, plastic and most rigid or flexible surfaces. Resistant to solvents, moisture and plasticisers. Also withstands heat up to 200 degrees. Approximately 250 mushroom stems per square inch. Serves as a great addition to any pedal board! It is stronger, cleaner and lasts longer than any Velcro.Note:Please do not use it on fragile items.