N-Trig, the Israeli company behind the digitizer tech in the Surface Pro 3 and many other top Windows tablets and convertibles, has updated its website and now offers a link to a line of replacement pens available via Amazon.

Currently discounted to $40 from their $50 list price, the DuoSensePen2 models are not compatible with all N-Trig digitizers. The new pens can only be used with the following devices: Microsoft® Surface Pro 3, Sony VAIO® Duo 11/13, VAIO Tap 11, VAIO® FIT Family, Acer® Aspire ® R7 572, ASUS Taichi 21/31 and Fujitsu Stylistic Q702.

The pens come in an assortment of five colors.

I recently had a chance to compare the DuoSensePen2 (above, green) with other N-Trig pens from (top to bottom) Sony, Microsoft and Acer. The new model is a full inch shorter than the Surface Pro 3 pen, although it surprisingly doesn't feel much lighter.

A clip cap would be a welcomed addition and help to better balance the pen in the hand.

The DuoSensePen2's nib is about the same consistency as the SP3 pen, slightly softer than the Sony's. Unfortunately, the pen does not ship with any spares.

Of the four N-Trig pens I've tried, I most like the feedback from the Acer Active Pen from my Aspire R7-572 convertible. Be aware that Acer's latest models use Synaptics digitizers and are not compatible.

With the Surface Pro 3 pen selling for $50, these new N-Trig pens are a nice option if you'd like to save a few bucks on a replacement or spare. Hopefully for the next generation, N-Trig will lengthen the pen to a standard size and perhaps design a flared barrel that's closer to a traditional paintbrush.