I don't understand your question. 58120 is an official part and should be in the official library.
http://www.ldraw.org/cgi-bin/ptscan.cgi?q=58120
Although I don't have the official library to test this at the moment.
Tim
http://www.ldraw.org/cgi-bin/ptscan.cgi?q=58120
Although I don't have the official library to test this at the moment.
Tim