This Vernier Caliper Ball Pen is a Good Product for Your Promotion. It Comes with a Cute Vernier Caliper Pen Are Easy to Write, Can be Started Quickly & Wont Drag, & Requires Only a Small Amount of Pressure to Complete Clear Transparent Lines. & It is a High-quality Plastic Pen Shell, Lightweight & Easy to Carry, Does Not Distort, is Convenient to Put in a Handbag & You Can Use It for an Emergency. It is a Great Gift for Your Childrens, Friend, or Personal Collection.