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Thread: i.d. ?

  1. Senior Member
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    #1

    Lightbulb i.d. ?

    Hi,

    Anyone knows to tell me what does "i.d." refer to in the below expression?


    The tubes 33 mm and 25 mm i.d.

    Does it means "inner diameter"?

    Thanks

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    #2

    Re: i.d. ?

    Yes, inside diameter. As opposed to OD, the outside diameter.

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