Sarasa Gel Retractable RDI 0.7mm Assorted. For the expressive creators of the world, the Sarasa Gel Retractable Pen line delivers noticeable color vibrancy and a flowing ink experience couple with Rapid Dry Ink (RDI) technology to promote a most pleasurable and confident creative or writing experience. Dries in less than a second on most surfaces. Ideal for the left-handed!Rapid Dry Ink (RDI) Technology dries in less than a second on most surfaces. No Smears. No Smudges. 0.5mm/0.7mm/dev4.0mm Point Size featuring RDI Technology. Ultra Glide Ink Performance. Left-Hander´s Best Friend! Each individual pack contains 10 Pens, Bundle of 2 packs, 20 Pens total.