Review on Hakko A5044 Ceramic Filter FR 4101 by Raymond Gray

The filters are about half the thickness of the original and don't last as long. UPDATE: I ordered the second batch of filters from FJKJapan and they are way better than the ones on sale. Olson trading post. The FJKJapan versions are identical in thickness to the original Hakko filters and work great. They also have a "Made in Japan" sticker. They are about twice the thickness of the ones I bought from the Olson Trading Post which are cheap imitations.