SW 2005 material assigned in part what is the custom property for the Tittlelbock

i am now using the SW materials assigned. the lack of info in the help menu doesnt really tell you what the property is to use in the titleblock. i tried the material property that was in the drop down menu but that was the old property in the part. i cant seem to find out what the property that SW now uses when you assign the material in the part.

can anyone list what i should be pasting????

Thanks

Ryan