Acrylic material Colorful big diamond, non-toxic and safe for kids. The color will not fade and they have ideal weight to sink well in the pool. Durable material ensures long-term use Beautiful treasure box included Comes with a vintage-style pirate treasure chest. The exquisite appearance attracts children and enhances playtime engagement 10 colorful big diamonds Assorted colors including blue, green, red, yellow, pink, and more. Vibrant hues capture children's attention and encourage swimming. Easy for kids to spot underwater due to large size Ideal for various occasions Perfect for summer swimming pools, encouraging young children to dive. Pool toy set with pirate treasure chest great for pool games. Suitable for summer parties, pool parties, beach activities, and school water activities Package includes: 1 acrylic diamond set with storage box Note: 1cm = 10mm = 0.39 inch Allow 1-3mm error due to manual measurement. Please ensure you are comfortable with this before purchasing Due to differences in monitor displays, actual item color may vary slightly from images