Chapter 9 Profile Tolerances 319 Unequally Disposed Symbol Specifications The Drawing The Meaning H = Letter height 1.5H 0.8H Unilateral profile tolerance provides additional material to feature or part Unequally disposed symbol Profile geometric tolerance 0.5 profile tolerance to the side that adds material to the part True profile Example 9-4. An application of a unilateral profi le tolerance where the entire profi le tolerance provides additional material to the feature or part.