or max gauge value.</div></div><div class=CToolTip id="tt328"><div class=CProperty><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td>this.needleThickness = null</td></tr></table></blockquote>Maximum thickness the needle. </div></div><div class=CToolTip id="tt329"><div class=CProperty><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td>this.negativeColor</td></tr></table></blockquote>css color spec used for filled (area) plots that are filled to zero 