Reliable Material: Heavy type index cards, offer four different pastel colors, made of 65 lb. cover weight paper which is not easy to penetrate ink Types of Packing: Offer 4x6 inch cards one hundred, two hundred and five hundred count, you can choose the right packing quantity according to your needs Ruled and Blank: The front side is ruled which is designed for taking notes, and the back side is blank which you could draw on Easy Writing: The surface is smooth and easy to write on, supports writing with a wide range of writing instruments such as pencils, gel pens, and highlighters A Variety of Uses: With a variety of uses, such as notecards, flashcards, and recipe cards, can help better collect and process information