The Pump Pen for Standard Nibs is designed to take nib units for all small and standard dip nibs, from crowquill units to Leonardt Principal nib units. This lets you use one Pump Pen for all small and standard size nibs. Just insert the nib unit into the front of the pen and go to work. When you want to switch nibs, replace one nib unit with the other.
Use the Pump Pen for Large Nibs if you want to work with the Hunt 101 and Mitchell Roundhand as well as all Brause and Manga nibs. You can use all nib units in this pen, however, smaller nibs have a tendency to dry out more quickly inside the large cap.
The Pump Pen for Standard Nibs is similar in size and shape to the Pump Pen for Large Dip Nibs except in the cap. The cap on the Pump Pen for Standard Nibs is shorter and the cavity inside is smaller to prevent the standard and smaller size nibs from drying out so quickly.