The purity of the 24K gold PurFlow Technology filter means: It is non-reactive and will never affect the taste of your coffee. It will not absorb unpleasant flavors like cheaper steel filters. It adds no harmful chemicals or bleaching agents like paper filters can. Our filters are manufactured to exacting standards using 24K gold with a purity exceeding 99% that is applied in a generous 2.5μm thickness layer with a durable Knoop C/D Hardness Grade rating for years of use and delicious tasting coffee.
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