Heat Shrink- On A Roll Thin Wall 1/2" IDSold in sets of 1 A Polyolefin heat shrinkable tubing that recovers to 50% of its original diameter when heated. During shrinking the tube will encapsulate the covered item. Typical uses include splices, wire bundling, markers, harnessing, stress relief, terminations, etc. Rated for continuous operating temperature from 55C ( 67F) to 135C (275F) and withstands elevated temperatures to 300C (572F) for short periods. Minimum shrink temperature is 121C