This is an original OEM Astro Astrobrights card stock, available in a pack of 250 sheets. The heavyweight cardstock provides great durability, making it perfect for color-coding, menus, posters, and more. It is acid-free and lignin-free, ensuring consistent, trouble-free press performance. Suitable for use in laser printers, inkjet printers, copiers, and offset presses, with a weight of 65 lb.