The Sharpie marker pen is the ideal accessory to keep with you out on the course. It will write on almost any surface and is fade resistant. So personalising your ball will be a breeze and to make a pair why not try it with the masters Align M up ball marker tool. The ink in this pen is also water resistant, so playing out in the rain wont be a problem either. Its safe to, the ink has an AP certified non toxic formula. So stop getting your balls muddled up and get a Masters Sharpie Marker Pen today.