Rohrer & Klingner 50 ml Bottle Fountain Pen Ink, Verdigris color-green Rollerball can be converted to

Rollerball can be converted to ballpoint

with an ink reservoir on the top

"Stealth" Monochromatic Matte Silver

Yard-O-Led and many unbranded pens using the Parker style refill

Rohrer & Klingner 50 ml Bottle Fountain Pen Ink, Verdigris color-green Rollerball can be converted toRohrer & Klingner Fountain Pen Ink, Verdigris, 50 ml Rohrer & Klingner writing ink in 50 ml bottles. Founded in 1892 in Leipzig, Germany, Rohrer & Klingner fountain pen inks are made following well established recipes using specially treated water, natural ingredients and brilliant colorants. The well balanced composition makes for optimal ink flow. Rohrer & Klingner writing inks are suitable for all fountain pens, quill pens and calligraphy utensils.