The industrial ink can be used on everything from paper and cardboard to plastic and metal

or anyone running their own color system instead of buying premixed every time

synthetic nylon

Fully refillable with standard 0

built around a 3

pentel pocket brush pen refill cartridges 4 pack hiddenproduct The industrial ink can beFour replacement ink cartridges for the Pentel Pocket Brush Pen (GFKP GPP3 series). Push engagement seal swaps cleanly mid session with no leaks. Pigment based black ink waterproof and fade resistant once dry, so watercolor washes or alcohol markers can go over your lines without bleeding or reactivating. Contents: 4x black cartridges Ink: Pigment based, waterproof, UV fade resistant Fits: Pentel Pocket Brush Pen (GFKP GPP3)