He wrote ml, along with every other thin veneer wholesaler I've spoken to. It seems to be the common unit of measure for veneers, aside from fractions of an inch, which didnt come up often. I already said I did email him asking though, so Ill soon find out.
Indi thanks for the link, Ive been talking to dozens of companies getting quotes, that one looks good, Ill give them a call as well.
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They seem to specialize in decorative veneer, from what I can see they dont carry plain hard maple veneer, but Ill phone them and ask to be sure.