The tape used to hold belts together ha a ONE YEAR life expectancy. Klingspor keeps it in a freezer until they are ready to use it. Belts are one of the few items it doesn't pay to stock up on. Once on a factory tour (not Klingspor), I bought a case of belts. Turned out to be the most expensive belts I ever bought. Most broke upon first use, due to age.