<p><a href="http://www.nakaya.org/epen.html">http://www.nakaya.org/epen.html</a></p><p>nakaya認為最好是14k</p><p><table width="550" border="0"><tbody><tr><font size="3"><font size="3"><font size="2"><font size="2"><font size="2"><b/><br/><font color="#000000">the reasons are:<br/>1. Highly corrosive-resistant so it doesn't rust and lasts for many years of usage.<br/>2. The softness of 14k gold makes for flexibile writing touch.<br/>3. Iridosmine can be attached firmly without losing its strength.<br/></font></font></font></font></font></font></tr></tbody></table></p>