These sanding sponges are about four or five dollars each and a large box from the hardware store. I can't imagine how much profit they have. But I'm sure it's huge. They work just as well and I've used them to sand down my wheels that I paint. I also used one of the courses or sand to sand away drywall dirt on the part of the wall I was repairing. In the future I will only buy them and not buy them in big stores because it will save me a lot of money.
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