Ultimate Guard 10 White Card Dividers White rigid polypropylene The high quality and rigid material keeps your dividers durable and strong, even after many uses Acid free - No PVC This product is completely free of PVC and acidic materials and therefore ideal for collectible cards Write-on index tab Convenient write-on index tabs that help you keeping track of your cards and organizing your collection 100% archival safe Keeps your cards safe and preserves the value of your collection during permanent storage