Here are the ingredients for their "Brooklyn" pizza, for example:
BROOKLYN
Contains
Enriched Flour (Wheat Flour, Iron, Thiamine Mononitrate, Niacin, Riboflavin, Folic Acid) Water, Vegetable Oil (Soybean), Sugar, Salt, Yeast, Vital Wheat Gluten, Less than 1% Dough Conditioners [Sodium Stearoyl Lactylate, Whey, Enzyme (with Wheat Starch), Ascorbic Acid, L-cysteine, and Silicon Dioxide added as processing aid], Corn Meal (used in preparation).
But don't ask me in what quantities because that's almost impossible to find out.

I know, though, that they use flour milled from Hard Red Harvest wheat.