The print quality on them is very bright. It only gets better when I take out the toner, shake and drum "clean" by moving the lever back and forth a few times. This makes it a little better, but then the print quality starts to get bad again. I've never had to do this with OEM drum blocks. This is clearly not a sustainable solution. I would not recommend them. I was trying to save a few bucks and saw good reviews here, but lesson learned.
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