Uniball 207 Refills 71207PP, 0.7mm Medium, Blue Uni Super Ink, Pack of 2. Gel pen refills feature smooth-flowing pigment-based Uni Super Ink with vibrant color. Water and fade-resistant gel ink helps you compose long-lasting, high-quality documents you can archive. For use with Uniball 207 and Uniball 207 Premier pens. Uniball Signo 207 pen U1A33951 works with this refill.