Product review (1 stars): Square tip opening.
If I could give it a 0 I would.  Purchased 2pack for use in Samsung RF4287HARS to replace filter #DA-00020B.  Tip on this filter NOT the same as OEM filter.  Installed the first filter and after a week or so started to get a loud vibrating noise when water was dispensed.  Checked/adjusted water pressure...no change.  Tried second filter and got the same vibration when water was dispensed.  Ordered an OEM Samsung filter and since installing have had no vibration or other issues.  I used a Water Filter Tree replacement filter purchased on Amazon in the past and it worked just fine.