PTFE tube size

I want to buy some more PTFE tubing as I may move my AMS units around a little (previously cut the existing tubes shorter). If I do need to purchase more what size inner diameter so I be looking for?
Thank you

This is the PTFE tubing I use throughout my entire system for the H2D and X1 Carbon, and it works flawlessly:

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Bambu specifies 2.5mm ID.

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