Staedtler 1.6 Maxum Ballpoint Pens Extra Large Extra Bold 1.6 mm Acid Free Brand New. Each pack has: 1 x Red, 1 x Blue, 2 x Black. Rubberized grip provides hours of comfortable writing. Transparent barrel for visible ink level. Scratch free, fade resistant, acid free, smear proof, permanent, quick drying, and waterproof ink. 1.6 mm bold ballpoint pens