The pen is solid metal, slim, and features the following:

* 0.5 mm mechanical pencil

* Black ink pen

* Red ink pen

* Orange Highlighter

* Clone of the black coloured Rotring Quattro selling for $95.

* Rotring spares fit this pen. Ink refills $1.80, from most stationers.

For more details, see the reviews on the Rotring Quattro:

http://www.the-gadgeteer.com/rotring-review.html

http://www.discountart.com/store/rotringquattropendata.html