Diameter (grip) = 10.9 mm; Length = 14.8 cm; Weight = 0.45 oz; ink composition = dye-basedThe same quick drying, smudge resistant ink that's found in the conical tip pens but with a needle-point tip for better precision.

The ink flows smoothly, and never smears, which is amazing

Fine line ink flows beautifully from these pens.

My favorite ink pens

Great ink flow, very very

That being said, the ink is absolutely amazing