Round Hand Reservoirs by Manuscript are custom made to fit on the underside of many types of nib to help retain ink for prolonged lengths of time. Fitting the Reservoir is simple, as it effortlessly slips onto the underside of the nib, and works best when it is pushed up to approximately 1/8th of an inch away from the end of your nib.
Easy to use and handy to have for Calligraphers, illustrators, graphic designers and Manga artists, as well as anyone else that is having trouble with ink retention when using dip pens.