I chose between this and the geyser bio 321, the price was very different, the standard was 2 times cheaper. I bought from this seller, after which I accidentally saw a comparison of these filters in the official group of the geyser manufacturer. It turns out that after the standard geyser you can not drink water without boiling. Keep in mind. Issued a refund because the product was not unpacked and not installed yet. But I think that such important information should be written in the product card.
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