Powell aluminum reel seat for fly rod, used. Total length approximately 90mm, inner diameter approximately 15.5mm, and the thickest part of the body is about 18.5mm. It was attached to a #4 rod that I purchased used, but it was a bit bulky for a #4, so I removed it. There are no defects or noticeable flaws, but it is a used item, so there is some minor wear and tear.