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I have my wife’s treadmill on top of these and I haven’t seen any black marks on my carpet. Throughout all the applications I’ve used these pads for I haven’t had an issue with marks being left anywhere. Hope this helps!
Sorry, there was a problem. Please try again later.I honestly can’t tell you. Mine is not on carpet so I can help with this question. Sorry.
Sorry, there was a problem. Please try again later.
