Diplomat Ballpoint Pen Refills, available in Black Blue and in three writing thicknesses: Fine, Medium and Wide. These refills are designed to deliver high-quality ink and provide a smooth writing experience. The Diplomat Ballpoint Pen Refills in Black Blue add a touch of style to your writing. The deep color combines the classic of black with a shade of blue for a unique look. Choose from the writing thickness that suits you best. The Fine nib is ideal for detailed writing and precise notes. The Medium nib offers a versatile option for everyday use. The Broad nib provides expressive and bold lines.