Product review (1 stars): Won't fit without some modifications with a knife.
Not a replacement for the DA29-00003B.

Returned the first batch to Amazon when they wouldn't fit and ended up receiving an identical batch.

Contacted Samsung when I received the second batch and they send me a link to a document basically saying "turn with more force":  http://support-us.samsung.com/cyber/popup/iframe/pop_troubleshooting_fr.jsp?idx=421356&modelname=RF267AASH/XAA&modelcode=RF267AASH/XAA

No amount of force will get it to fit without breaking the base.

At the end, I ended up following the advice from several reviewers and slicing off the leftmost tooth on the locking tab.  After removing the tooth the filter turns and locks.  It still takes more force than the original filters but it does turn.

Samsung engineering screwed up when they declared that the DA-00003G units were replacements for the DA29-00003B without testing it.

Even with the third tooth removed the locking tab looks a little different and it takes more force but it's usable.  I just don't feel that I should have to carve out parts for a filter that costs this much money.