Novel polymer shrink tubes, such as fluoropolymer shrink tubes and novel uses thereof. The jet outlet openings can be formed in an insert of the jet disk made from elastomeric material. The solidification matrix may be used, for example, in a solid detergent composition. The four resistance states are detectably different. In this state, the coil is naturally cooled for a predetermined time to suppress growth of an oxide film and increase productivity. Also provided are pharmaceutical compositions containing such compounds and processes for preparing such compounds.