The Filofax erasable ballpoint pen refill in black (pack of 3) 149011 is the essential replacement to keep your erasable ballpoint pen working with maximum precision. This set includes 3 quick-drying black gel ink refills, whose formulation allows you to erase mistakes without leaving marks on the paper. They are easily replaced in any compatible Filofax erasable pen. Recommended for those who make intensive use of writing in their diary or on work documents.