Flash cards set consists of 4 packs of 200 counts, with colors including pink, yellow, blue, and green.Each flash card has two hard brown papers on both sides, which can protect the inner pages from damage. The index card paper set comes with 4 iron rings. You can use binding rings to combine paper of the same or different colors as needed. The binding ring is very easy to install and remove. The size of the flash cards is 3*5inches, which is easy to carry and does not take up space when in use. The record card has horizontal lines for easy diary recording. Cardboard is made of high-quality paper, printed on one side, with smooth writing and no ink leakage. Flash cards are widely used, suitable for school study notes, office work schedule records, daily shopping lists, etc. Color: As Shown Material: Paper Package Contents: 4 packs of 200 counts flash 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.