SAKURA-Gelly Roll Gel Pen Set: Moonlight. Size: 1.0mm roller ball-bold line. This set features ten luminous colors of ice cream smooth gel ink that even glows under black light! This ink is permanent; waterproof and works like a paint pen on all colored papers; report covers; vellum; and photographs. This package contains ten pens; Rose; Fuscia; Purple; Teal; Blue; Yellow; Orange; Vermillion; Pink; and Green. Not evaluated for cosmetic use on skin. Imported.