These UV beads are sure to instantly beautify your DIY jewelry projects. They contain a color sensitizer that allows them to change color when exposed to sunlight or ultraviolet light. Whether you want to craft a pretty anklet or a colorful bracelet, these beads will complement your designs.Details:Multicolor9 mm bead size3 mm hole sizeApproximately 500 beadsPlasticFor ages 6 and up