are the idler and tension pullies the same pully or are they different on 2009 Kia Sedona

the parts store can only pull up a tension pully and they look the same. are they interchangeable or are they different.
the idler pully is wore out and is making this high pitch screaming sound while its running and the faster you go the louder it gets

Asked by for the 2009 Kia Sedona
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1 more answer , 1 more comment
no, they are different diameters.

Thank you