Features: Safe material: these UV beads is made of resin, safe and durable material, enough quantity is meeting for you for long for time. Glow in the dark: they will glow in the dark if they are put under the ultraviolet first for a while, otherwise, they will not glow in the dark; The for stronger the ultraviolet radiation, the brighter they will glow in the dark Multiple uses: you can use these beads to make various bracelets and pendants or decorate your hair Tip: beads are suitable for children aged 5 and above, do not let children do it alone, lest children eat beads. Wide applications : Selected gifts for children's DIY projects, eads used for making racelets, anklets, necklaces, and other jewelry, and toys that stimulate children's curiosity and cognition. Specifications: Material: Resin Color:Yellow/Pink/White/Green/Reddish Purple/Teal/for Sky Blue/Orange/Red/Yellow/Random Mix Size:Approx.2mm/0.078inch Weight:10g/bag Package Includes: 1 Bag Beads (660pieces) note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.