Cylindricity
The Cylindricity form
tolerance controls the shape of a cylinder feature without controlling
the size, orientation, or location. The surface of the considered cylinder
must lie within a tolerance zone bounded by two concentric cylinders whose
radii differ by the specified tolerance value. Cylindricity controls the
circularity, straightness, and taper of the considered cylinder. Material
condition modifiers and datum features are not allowed.
(A) If your drawing has this. (B) It means this. (C)
A .001 wide tolerance zone.
Checking
Cylindricity
From the 
