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20/02/2026

Art.-No. |

Package size

30 m

50 m

60 m

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Heat shrinkable tubing 2:1 - flexible and coloured >

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Calculators

Calculator tool for Heat Shrink Tubing

Calculator tool for Heat Shrink Tubing

for TF21-25.4/12.7 - Art.-No.: 309-12545
In selecting the right shrink tubing size it is important to consider to "80:20 rule". Shrink tubing should recover at least 20% and maximum 80% of its potential shrink range.
According to which specification would you like to check if the selected product is suitable for your application?

diameter

Please enter either the smallest and/or the largest outer diameter of the substrate.

Min mm Max mm

Cross-Section

Please enter either the smallest and/or largest cross-section of the object to be covered.

Min mm² Max mm²

perimeter

Please enter either the smallest and/or largest perimeter of the object to be covered.

Min mm Max mm
Wall thickness calculator

Wall thickness calculator

for TF21-25.4/12.7 - Art.-No.: 309-12545

Depending on the substrate dimensions when Heat shrink tubing is recovered the diameter and the wall thickness will change. This Calculator aims to offer a theoretical wall thickness for this situation.Please enter the outer diameter of the object to be covered

Outer diameter of object (A)

mm

Inner diameter of tubing after shrinking (B)

mm

Wall thickness fully recovered ( C )

mm

Solutions

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