P2155 Darth Vader Connect & Build Pen was a pen designed by LEGO. It is a primarily red and black pen, with a piece resembling a Darth Vader minifigure attached at the top part. Elements of the pen can be attached and detached, and customized to the users liking. It should be noted that the Darth Vader element is not actually a minifigure, as it has a hole running through to be attached through the pen.
This is a description taken from LEGO.com. Do not modify it.
It's the only pen you connect and build yourself - in LEGO Star Wars style! Choose from a variety of unique pieces, including Darth Vader minifigure elements, and assemble your pen in any order you choose! Ballpoint pen writes in black ink. Pen features a molded grip for writing comfort! Special elements include minifigure pieces and Darth Vader's cape!