Product review (2 stars): These are only good for 300 gallons
These are only good for 300 gallons... The original Bosch are good for 769 gallons - so less than half life. Also, black carbon was in the first 6 batches of ice - and it was dark grey. No telling how many batches had low levels of things I can't see.

Not as good as OEM by any stretch. I will not buy these again.