Uni-Ball® 307™ Skip-Free Writing Medium 0.7 mm Black Gel Pen. Vibrant. Writes on glossy paper. Comfort grip. 2 Black 307™ pens. When inspiration strikes, count on the performance and design of Uni-Ball®. Make a statement with thick and vibrant ink that provides striking, bold colors. Features Uni Super Ink™ with 3 way protection against water, fading and fraud. Textured grip provides superior writing comfort and control. 307™ gel ink delivers vivid, bold lines without skipping or blobbing. Exclusively made for Sanford, LP. By Uni Mitsubishi Pencil, Co. If you are not completely satisfied with your product, please contact Uni-Ball at www.uniball-na.com. ©2015 Product of Newell Rubbermaid Office Products.