set of 4 sanford liquid expresso extra fine line pens free shipping Set of 4 Sanford Liquid Expresso extra fine line pens. Ultra-smooth liquid ink pens. The liquid ink colors are pink, purple, red, and green. These pens have an extra fine line. The quick drying ink of these pens prevents smearing. The Liquid Expresso pens have a durable porous plastic tip for smooth writing. The clear barrel reveals the ink supply. Art and Creative Materials Institute (ACMI) certified and conforms to the ASTM D 4236. These Liquid Expresso pens are perfect for writing in memory books or scrapbooks, journals, diaries, notebooks, and etc. Also excellent for taking notes at school, drawing, art and class projects, writing creative letters, making unique greeting cards and invitations, and more.