The maximum physical media size in the feed direction of this
media path expressed in units of measure specified by
PrtMediaPathMediaSizeUnit. A value of (-1) implies 'unlimited',
a value of (-2) implies 'unknown'.
Additional information:
The values returned by these objects depend on the value of
prtMediaPathMediaSizeUnit.
It is 140000 if prtInputDimUnit is
ePtenThousandthsOfInches or 355600 if prtInputDimUnit is ePmicrometers.