acrylic of good , hard, sturdy and , not easy to break, can serve for a long time. Detail stands out . The unique shape with rounded corners allows for better grip when using it and the allows positioning. Clear acrylic blocks, let you see when you're stamping. Are good for stamping craft projects like notebook, journal, cards, invitations, scrapbook pages, stamps, schedule book, clipboard, planners, . Easy to with water and towel, you shall before every application for better in using. Clear Stamp Block only,other accessories in the picture is not included.