We are pleased to let you know that we are providing you with another level of customization! Previously, the direction of Maestro Pen Co. was to use Bock nibs exclusively; however, after some research and consideration we will not only give you the option of customizing your writing instrument with a Bock nib but we will also give you the option of outfitting it with a JoWo nib as well. Both are fantastic nibs! Now, it’s up to you to decide which brand suits your interests the best. Also, Once the order form is complete, you will see the various nib options available. Currently, any 5mm nibs will be Bock and any 6mm nibs will be JoWo. However, 5mm and 6mm nibs in both brands will be available soon. Stay tuned….