We do our best to source and build the best products for 3D printing needs. However, we sometimes get items in that are damaged in shipping etc... When we find something that doesn't meet our quality or service, we usually just get rid of it. But once in a while, we come across something that's still useable, but maybe doesn't fit our description of the product. Take for instance our filament. We weight our spools to ensure that what we sell, you recieve, and sometimes we find a few spools that have color variations etc... They're still good to print with, but aren't up to the regular standards, so we pass the savings on to you!