Hello! I have been posting some pictures on this pen, our "vacumatic". The Venvstas V.A.C. in carbon fiber, but many of you asked for a video to see the pen. Here the link to the video, where you can see it in action, and also dismantled on the spot. https://www.youtube.com/watch?v=PW4mv6iJE0E&t=2s Characteristics: Carbon fiber/fiberglass construction, 14k 6 mm nibs as standard. Vacumatic type of filling mechanism with piston instead of diaphragm for producing the vacuum, SPRING action, no blind cap and locking mechanism. 6mm feed in-house made in carbon fiber with stainless steel breath tube. Carbon fiber pen case included. 2.0ml effective ink capacity. https://www.venvstas.com/vac