Grenco Science has been making waves over the past few months, collaborating with everyone from Huf to Snoop Dogg on their signature microG Pens. Being an equal opportunity company, they have now teamed up with world-renowned graffiti writer, Claw Money, on a signature microG Pen. The entire set is complete with that Claw Money treatment. Check out the slide show to see all the details, or float on over to Grenco Science online shop to grab yours today.