1: Made from high-quality PET material, waterproof and writable. The transparent design does not cover any highlighted information. Ideal for marking and highlighting text without smudging. The smooth surface allows for writing or marking. 2: The sticky notes can be easily applied or removed and leave no residue on the page. You can use different pens to write text on the transparent sticky notes without damaging the book. This allows the tabs to be reused multiple times without causing issues. 3: Our index tabs are available in various colors and make sorting by color codes easier. You will receive the colors you selected from the specified list. Each pack contains 8x20 tabs, totaling 160 tabs per pack.