This is an OEM assortment of brightly colored Astrobrights paper, featuring 500 sheets per ream. The paper is acid-free and lignin-free, designed for compatibility with laser and inkjet printers, copiers, and offset printers. The colors included are Lunar Blue, Gamma Green, Re-entry Red, Orbit Orange, and Sunburst Yellow, all in a 24 lb. weight. Ideal for creating attention-getting notices, flyers, announcements, and bulletins.