Complete burning pen, pen body and tip are attached as one unit. They are not replaceable tips.
Modified Writing Tip (Not Sharp).
9M pen is about 0.040" in diameter.
Very similar to the standard #9,
but has the end of the tip ground symmetrically, and the end is perfectly round.
This is a good choice when you need it for more than just signing your work like for "Pointillism"
or drawing, and the "choke point" created at the end of the tip also keeps the pen body much cooler for much longer than the standard #9 pen does.
The end of the tip for the 9M pen is about 0.040" in diameter (1mm), and about 0.030" (3/4mm) diameter for the 9MS pen.
Look at the #19 pens if you want something similar but bigger.