Hold up there partner, the knock off filters are not the same and I would suggest not using them. I have the original Berkeys and these (yes I fell for it once) which are not the same quality they have a glued on top black cap on the black filters your originals are all one piece of filter. I decided it was not worth it and didn’t use them if there’s an emergency maybe. Also you can find the originals for a lower cost Natural News had them for awhile you might check see if Mike got more in.