This package includes 1600 pieces of index tabs in 8 packs, with 20 pieces per color and 80 different colors, providing a practical and versatile solution for color coding and organizing documents and catalogs. Mr. Pen index tabs are made of top quality Pet material and special adhesive, waterproof, non-toxic, and have no odor. You can get smooth and clear writing on the tab using most pens, markers, and highlighters.