Youre sure to find exactly what you need among these two high-quality tapes. All feature strong polypropylene backing with quick-bonding acrylic adhesive. Standard grade Scotch® #311 reliably seals light- to medium-weight boxes, works well in cold, damp conditions and on recycled fiberboard. For the most demanding applications, choose high-performance grade Scotch® #313. It sticks well to most surfaces, has a higher tensile strength, and the crystal clear film will not yellow. Order in case quantities specified, priced each. Color: clear.