Pentel Hyper G Retractable Liquid Gel Pen, 0.7 Millimeter Medium Tip, Blue Ink, Box of 12 (KL257-C) Imperative for important documents, this pen is people safe, check safe, and earth safe. Part of the Pentel Recycology family, this pen is made of 57% recycled material. Low viscosity, permanent, water-proof ink will withstand the test of time. Latex-free grip offers exceptional writing comfort and control. Retractable and conveniently refillable with Pentel KLR7 ink refill.