Defining belt cross section

[JeffNemes]

HA = 1/2" wide x 11/32" deep HB = 21/32" wide x 7/16" deep don't know about shallow[A href='http://www.simpletractors.com/parts/belts/belts_(pg19).htm']http://www.simpletractors.com/parts/belts/belts_(pg19).htm[/a]

[Guest]

HELP What does HA,HB, and HB shallow mean when referencing the belt cross section? Thanks Ken D