pilot frixion refill patron 1 0 mm 3 pack Colors:Blue / Black The hardcover is the better

The hardcover is the better choice for desk-based technical drafting

and it's refillable with refill cartridges rather than thrown away once it runs dry

Composition: colorless synthetic resin

Clean 6 mm horizontal lines keep cursive and shorthand uniform

The breadth of color allows for high tonal contrast with clean transitions

pilot frixion refill patron 1 0 mm 3 pack Colors:Blue / Black The hardcover is the betterThis Pilot FriXion Ball gel ink refill in 1. 0 mm fits the medium tip size used across the FriXion Ball, FriXion Clicker, and FriXion Pro pen range, with three gel ink cartridges of the same color in each pack. As with the rest of the FriXion line, the ink is thermo sensitive: the friction tip on the pen generates heat, around 60C, that turns the ink transparent on contact, letting you erase and rewrite over the same spot without damaging the paper