Form: This specification covers a crosslinked polyvinyl chloride plastic in the form of flexible@ thin-wall@ heat-shrinkable tubing. Application: Primarily for use as a flexible@ electrical insulation tubing whose diameter can be reduced to a predetermined size by heating to 175 ??(345 ?? or higher. This tubing is stable for continuous exposure from ?C 20 ??(-5 ?? to +105 ??(+220 ??.