Smooth hybrid ink. These will also fit the Tombow Airpress pens if you want a
bolder line. You just have to trim the refill shorter, which is probably safer
to do after the ink level is about half used up.
Wow. This ink glides like water on ice. It is so incredibly slick and smooth, I
would love to know if there is any ink that flows any smoother than this!? I
just love them so I got them in all 3 colors. I put these 1.0 refills in my "UNI
Jetstream 3 0.5" because I like thicker nibs.