Description: The paper can be combined at will, the inner page can be flipped, and can be increased or decreased at will if you have this product. You can arrange your notebook pages flexibly and easy and convenient to increase or decrease notebook pages, without damaging the paper, so it is really useful for most people. With these round discs, you can classify and manage different recorded content, different color for different kinds of files, or add business card bags, photo bags, file bags, etc. according to your needs. It is constructed of abs material. Diameter of this product is 2.4cm. You can use this to classify and manage different recorded content, different color for different kinds of files. Item Name: Binding Button Material: ABS Features: Solid Color, Useful, Anti-crack, Durable Size Details: Diameter: 2.4cm/0.9" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 30 x Binding Button