That doesn't explain why D-76, Dektol, and Fixer are sold in packages that make 1 US gallon. Surely, they sell this stuff outside the US. So why, if they package these items differently for export, can they not do the same with XTOL? Don't get me wrong. I really don't care which unit of measure is used. I can measure it all the same. I just don't understand the lack of standardization.