Tombow Airpress 0.7mm Ball Point Pen, Clear (BC-AP20) + Refill (BR-SF33) Set (Japan Import) [Komainu-Dou Original Package] Unique pressurizing mechanism to push the ink in the compressed air. Upward writing is realized. Airpress can play an active part by very various situations. All surfaces of the body, rubber coating. Powerful wire clip.