Stack Stamp, APPROVED, ENTERED, PAID, 1 13/16 x 5/8, Assorted Fluorescent Ink, Sold as 1 Each Stacking message stamps with assorted fluorescent ink colors. Innovative design allows you to interlock multiple stamps in one continuous stack. Convenient for storage and effortless use. Vibrant, fluorescent ink colors and fresh fonts provide style. Crisp, clean impressions from the microporous gel.