PERFECT CONFIGURATION--- To make the room full of rainbows, with multi-faceted to reflect lights, reflect to rainbows that are form with the sun give a great light show, just use our K9 10pcs * 1.5"/38mm crystal ball prism. K9 PREMIUM MATERIAL-- Our crystal prism is crafted from advanced K9 material, renowned for its higher refractive index and superior transparency. Lead-free and safe, these charmingly designed crystal prisms emit a vibrant spectrum of colors, rivaling the brilliance of flat crystal with their super twinkling effect and enhanced clarity. HOW TO USE-- It has a small hole at the top, you can use a rope, fishing line, nylon line or dental floss to pass through the hole and hang it up anywhere to decorative, when sunshine through it will make and blast rainbows. MULTI FUNCTION-- Nice for Home Office Garden Window, Feng Shui Crystals, Chandelier Crystal Parts, Wedding Decoration, Christmas Tree Decor or any crystal projects. Good for sun shine catcher as a house, garden and car, It's also fun to turn these to enhance a new light fixture very pretty on your christmas tree, party decoration, DIY chandelier and more, get an amazing light & color show! BRAND GUARANTEE-- 100% Customer Satisfaction Guarantee, GIA Association certified retailer, specializing in providing high-quality jewelry. WINDOW PRISM: high clarity and cast beautiful rainbows. Hanging crystal ball prisms in the window and when the sun shines it it makes the most beautiful color. Made of top crystal glass material, NOT acrylic. NOT plastic.