Noodler's Ink Acrylic Neponset Fountain Pen - Lake Baikal you are buying ONE Noodler's Ink Neponset Acrylic Lake Baikal Music Nib FP nib: 3 tine - music nib piston fill; takes any fountain pen bottled ink length: 6"; packaged in Noodler's Ink cardboard box Instructions on how to use a piston fill fountain pen are included from Noodler's Ink