Additive (A) case.
It is recommended for use with the [399,129] [300,039] [300,040] and [310,038]. You must use the [399,126]. "Hide
by Lynn Sharp Paine, Mihnea C. Moldoveanu Source: HBS 2 pages. Publication Date: February 22, 1999. Prod. #: 399127-PDF-ENG