Paper Mate InkJoy 100RT Ballpoint Pen, Retractable, Black, Single (1803472) Inkjoy's unique blend of ultra-low viscosity inks and optimized writing tips gives you crisp, clean lines and unparalleled smoothness. A range of sleek and modern pen designs houses a rich palette of vivid ink colors to dazzle your writing imagination. The InkJoy 100 series has a triangular shape that is comfortable to hold and won't roll down inclined desks and tables. The colorful tinted body and white refill give the pen a refreshing look. Tip retracts for convenient, one-hand use. 1.0 mm point gives you a nice, solid, smooth line for general writing.