Uni-Ball Signo 207 is an automatic gel pen. Its unique writing tip helps prevent paper scratching and allows writing at a very sharp angle. This model uses pigmented ink UNI Super Ink (Super Ink) which is water-resistant and fade-resistant. The body of Uni-Ball Signo... 207 is made of tinted plastic and features a rubberized textured grip area for the fingers, which prevents the pen from slipping during writing and reduces effort for the owner. The color of the tint matches the ink color: black or blue. Replaceable refills. Tip diameter is 0.7 mm. Line thickness is 0.4 mm.