uni-ball® 207™ Retractable Fraud Prevention Gel Pens, Medium Point, 0.7 mm, Black Barrels, Red Ink, Pack Of 12

The Uni-Ball Signo Gel 207 retractable roller ball pens are some of the best pens I ever had. They are very smooth and write well. I prefer the medium thickness; I tried the thin (0.35 mm) version of another Uni-Ball pen and found it to be too thin for me. The 0.7 mm thickness works well for me (the 0.5 mm is good as well). I have used the red and black ink pens and both colors are great. For some reason, red pens tend to cost more than black or blue ink, perhaps because there is a higher demand for the latter two colors. I searched many vendors and found the red pens from this vendor to be the cheapest (although I bought a box of 12 black pens from another vendor for a couple of dollars cheaper).