Unique 3 Dimple Tip Technology From Japan For Smooth, Uniform And Precision Writing. Pure Liquid Ink For Ultra Smooth Writing. New Air Tight And Through Mechanism Att System To Ensure An Instant Writing Start Every Time. Extra Large Ink Reservoir For Non Stop Writing. 0.7 Mm Cemented Carbide Alloy Ball Delivers A Line Of Width Of 0.4Mm.