The description says they are 30 ppi filters. I've ordered them 3 times and they're always labeled 30 ppi, but they're comparable to any 20 ppi filters I've bought. These are filters with a pixel density of 20 pixels per inch, and they are mislabeled. I have so many 20ppi filters I don't know what to do with them (and no 30ppi filters to replace the filter). I am returning them and will not buy from this company again. Too bad they are good for 20 ppi.
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