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.