Description Esterbrook Cobalt fountain pen ink is a deep, rich shade of blue, and is specially formulated to combine a vibrant color with a smooth-flowing writing experience. The 50ml glass bottle is a fairly standard shape that is easy to hold while you refill your pen. Having trouble deciding between colors? Use our Ink Comparison Tool to quickly and easily view different colors side by side.We offer Free Shipping on all orders over $50 for US customers, and for orders over $250 for our Canadian customers. We offer Free Shipping on all orders over $50 for US customers, and for orders over $250 for our Canadian customers.
