The blue pen on my desk
The clip says the name of the manufacturer and the size of the ballpoint. Inside the clear barrel, a cylinder is filled with dark ink. The grip is rubber and has eight indented ribs. The tip is conic with an opening at the end. Inside the tip, there is the ballpoint and the metal piece that connects the ballpoint to the ink. The metal piece is wrapped in a spring. When you click the button on the back of the pen, the spring compresses as the ballpoint emerges from the end and then clicks into place.