Ring and Ball, mounted on separate handle Ball, dia. 19mm, Each

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Here is the corrected text: This 19mm ball-and-ring apparatus is individually mounted on rods with handles, ideal for demonstrating thermal expansion in science classrooms. When cold, the ball passes through the ring, but after being heated, it does not fit. The ball measures 19mm in diameter and, along with the ring and rods, is made of high-quality brass. Mounted onto superior wooden handles, this excellent demonstration tool showcases Eisco Labs' commitment to quality and durability. We proudly manufacture our own products using state-of-the-art equipment and adhering to the highest standards of quality control. Each product is carefully designed by a team of laboratory professionals and experienced engineers with quality and durability in mind. They are manufactured with only the highest-grade raw materials, according to international quality standards, to ensure they can withstand use in even the toughest laboratory environments.