H143-R. Reservoir for H143 Adjustable Holder.
This handy accessory allows the nib to hold 3-4 times more ink than the nib alone! It is attached to the backside of the flat-tray flange and works with almost any nib. The reservoir is specific to this oblique holder; it is not a universal reservoir. Stainless steel.
Excellent design. Simple to attach. It´s not bulky. Feel like you are using a fountain pen Must be cleaned before use as the pointed nib.