This set includes 25 precision 3mm synthetic ruby balls paired with 5 polished white Shinju pearls, offering a versatile combination of materials for creative applications. The ruby spheres provide exceptional hardness, durability, and dimensional consistency, making them suitable for precision uses such as CNC probe stylus inserts and measurement tools. Their smooth, polished surfaces ensure reliable contact and long service life. Complementing the ruby balls are 5 Shinju pearls, featuring a bright white finish and a highly polished surface. These pearls offer a refined visual contrast and a smooth rolling surface, making them ideal for applications where appearance, fluid motion, or alternative material properties are desired. Beyond technical applications, this set is well-suited for jewelry making, beading, bracelets, and other craft projects. The combination of deep red ruby and clean white Shinju creates strong visual contrast while maintaining uniform sizing and consistency for easy integration into designs. Whether used for precision tools, material testing, or creative projects, this mixed-material set provides flexibility, durability, and consistent performance.