Product review (3 stars): Seems fine/remove caps
Arrived as expected.  Seems to work as advertised and fits.  I have not had water tested to see effectiveness of filters.

Make sure you removed plastic caps.  I did not notice caps on a cursory glance and did not remove prior to attempting to install.  Thus caused a fitment issue at first.  It was resolved in short order.  The caps are not noticeable.

I suggest a contrasting color cap in the future.  Clear/white isn't easily seen.  Perhaps Orange or red.