I purchased four filters to fit into my Berkey. The website claimed they were the Aquacrest-BB9 filters, which I've purchased before and have been very happy with. Unfortunately, it looks like they're not Aquacrest brand - they don't say "Aquacrest" anywhere on the packaging and the taste of the water is bad. I've purchased a few off-brand filters in the past ten years and these are by far the worst. I can't recommend them at all. They make my well water taste like a chemical soup. I tried reaching out to water-filter.com customer service and was ignored. Sadly, they're not shipping the product they're claiming to sell.