The Leonardt DP40 is a pointed nib produced by Manuscript UK. It is largely thought of as a decorative nib with its fanciful electric blue hue. It is sometimes confused with Brause 361 'Blue Pumpkin', and is often thought of as a little more flexible.
You can use it directly with sumi ink, or prepare the nib before first use by washing with toothpaste. The blue coating fades with use, don't be alarmed!