The inside diameter of shrink tubing depends on the outside diameter of the substrate onto which you will be shrinking. Choose an expanded size that fits over your substrate and will shrink down with heat more than the substrate's outside diameter for a snug fit. For a thinner recovered tube wall thickness, choose an expanded size that "just" slips over the substrate.
Title: How do I size heat shrink tubing correctly?
Description: How to pick the right heat shrink tubing ID.
Last Edited: 1/23/2023
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