Noodler's Ink Blackerase (waterase) is part of Noodler's Waterase series of inks. When used in a refillable marker, they can write on whiteboards and other non-porous surfaces and can be wiped off with a damp cloth. Can also be used on paper and in fountain pens like a normal fountain pen ink through they tend to feather.
Free pen included
Be Careful while opening as the bottles come full to the brim.