Papermate Kilometrico Ballpoint Pen 1.0mm, Black - 10 Pack. These Paper Mate Kilometrico Ballpoint Pens are perfect for everyday writing thanks to their long lasting ink supply and smooth writing nib. Each pen has a 1 mm nib which is perfect for everyday writing and note taking. You can use these pens on most paper types. The pens contain oil-based ink which flows smoothly for a comfortable writing experience. Each pen has a round plastic barrel that's comfortable to hold. The pen can also be used on carbon paper thanks to the tungsten carbide ballpoint. The pack contains 10 black ink pens.