PIP_PSLD_WET_DENSITY … what is this?

I understand by physics that MASS=DENSITY * VOLUME

PIP_PSLD_WET_DENSITY … what is this? I do not understand why this parameter is driving the mass property calculation of MASS versus the Density assigned in the material of the part. The material of the part should drive the MASS. And where does the PIP_PSLD_WET_DENSITY value come from?

.000722*.71385798=0.00051541

Seems to be close to what the mass is calculating but not exact

Hand Calculation:

Density of Copper = .296748 lb/in^3

Volume of tube = .71385798 in^3

Mass = .296748*.71385798=0.21183593 lb

I searched for PIP_PSLD_WET_DENSITY in the Config.pro options with no luck. And returned no results in an internet search.

I edited this parameter within the part to be the density of copper

And then I end up with the correct Mass of .128 lbs in the mass properties??!!!