Flat bottle caps are applied to crafts, scrapbooking, hair accessories, pendants, earrings, and many other DIY projects. Great for art class projects, holiday decorations, and birthday party fun.SpecificationMaterial: Metal, ResinSurface Treatment: Baking VarnishOverall Dimensions: 33 x 3.3 mm / 0.13 x 1.3 inch (Dia*H)Bottom Inner Diameter: 25.4 mm / 1 inchPacking List: 20pcs x Double-Sided Colorful Craft Bottle Caps, 20pcs x Clear Epoxy StickersAdvantages1. Bottle caps are made of metal material, the bottle caps are pressed flat, painted on both sides, and have smooth edges, perfect for DIY projects.2. Convex round flat bottle cap with an equal amount of clear epoxy sticker, positioning the image on the cap creates a 3D look.InstructionPhotos or other small items are embedded in the flat bottle cap, covered with transparent stickers, and punched on the edge with a hole punch to make necklace pendants or ornaments.NOTE: These bottle crown caps are for craft use only, have no rubber lining inside, and are not intended to be used as bottle sealing caps.