The Pentel Sparkle Pop gel pens add a unique “POP beauty” of color to your writing world. New sparkling iridescent ink changes color when writing on black or white paper to make your writing and artwork stand out. Smooth metallic gel ink and extra-long balanced barrel for effortless writing and control. Latex-free grip for comfortable writing and drawing. 1. 0mm metal tip writes bold lines. Ap certified. Backed by a limited lifetime.