I have a DeepCool case fan, and I want to know what the static pressure for the fan is.

Each fan has different specifications, so you might want to check the specs tab on their respective product pages. The static pressure of a fan is measured in mm/H2O (mmAq) (i.e the GS120 fans are rated at 1.97 mm/H20); so that is the stat that you will be looking for.