1/4"X40 Feet Perma Tack; Apply a 1/2 in. or 1 in. strip of adhesive exactly where it is needed. The easy glide-on dispensing action allows a small amount or continuous line of high-performance, pressure sensitive adhesive to be applied. The easy slip-in cartridges eliminate the worry of having to reload in the middle of a project. For use on most surfaces, acid-free and photo safe.