No greylite 14 apparently is a "brand" name and onedayglass doesnt carry that. Plus with shipping cost on top of it all its about $30 more expensive to go with onedayglass. My piece cost me $38 from a local glass shop. Also, I dont think onedayglass has glass as dark as greylite 14, I think their solar grey is 31% (lets 31% of light through from what I understand). Greylite 14 lets 14% of light through - although as I say that may be debatable.