Diplomat Fountain Pen Refills, available in two classic colors: Black and Blue. Designed to fit Diplomat fountain pens, these refills offer a sophisticated writing experience. Add a touch of elegance to your writing with Diplomat Fountain Pen Refills Black. The deep black color provides clear, detailed lines and is ideal for formal documents and important notes. For a timeless look and a fresh touch, there's Diplomat Fountain Pen Refills Blue. The bright blue color adds vibrancy to your writing and is perfect for everyday use.