Ultra- 180gsm Cardstock: Crafted to withstand frequent handling, these index cards resist bending and ink bleed-through. Ideal for use with markers, pens, and highlighters, they maintain integrity even under rigorous use. Assorted Vibrant Colors: This set includes 50 sheets each of white, pink, , blue, and yellow cards, making it easy to organize information by subject or priority and enhancing visual learning and memory retention. Includes Convenient Key Ring: Each pack comes with a key ring that keeps your neatly organized and portable. This feature is perfect for students and professionals who need to study or reference information on the move. Versatile and Practical: These cards are not just for studying! Use them for crafting to-do lists, jotting down vocabulary, planning projects, or setting reminders. Their versatility makes them a must-have for students, educators, and professionals. Smooth Writing : The premium-quality, lightly textured cardstock ensures excellent ink adhesion and smooth writing. Whether you're using a pen, pencil, or highlighter, these cards provide a superior writing experience. Color: Mixed Color Material: Paper Package Contents: 250*colored index cards Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.