How To Select The Correct Size Of Heat Shrink Tubing
The two most common ratios of heat shrink tubing are 2:1 and 3:1, which basically mean that the tubing can be shrunk to twice or three times its recovered size. The greater the size variation, the larger the shrink ratio that is required. (2:1 shrink ratio: 50.8mm (2') will recover to 25.4mm (1') or 50% shrinkage.
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