
Like another customer I bought these filters because they were to replace the 3M 3US-AS01 / 3US-AF01 replacement cartridge. I have researched the product and believe it will work because the description says it will work. I bought these over 3 months ago to have on hand when the filter needs to be replaced. Today I was trying to replace a used cartridge with the AQUA-CREST AQU-3US-AF01 I had and found the cartridge didn't fit. It doesn't rotate into position, so you can snap it into place and I won't force it. So I lost the purchase price of these two filter packs.

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