Ink reservoir for Pump Pens and Fountain Pens

Ink reservoir for Pump Pens and Fountain Pens. Brand new. Comes with a cap. Carry around with extra ink for a quick change while drawing in the field. The reservoir slides into place, seals perfectly, and triples the carrying capacity of the pen. 

Note: The product picture shows two reservoirs to give you better views of the product. We only ship one reservoir with cap. 

Note: This reservoir also fits into the Kohinoor Art Pen. Two pictures are shown. The Kohinoor Art Pen is a popular artist fountain pen produced thirty years ago, and now found occasionally on eBay. The only problem with that pen is the small reservoir.