According to my experience this 1Kg mass is perfect for measuring and demonstrating the principles of mass in science classrooms .It has a hexagonal shape that prevents it from rolling off flat surfaces, making it easy to use and store. The mass is made of high-quality materials and feels very durable, so it will hold up well over time. The only downside is that it might be a bit heavy for younger students to handle on their own. Overall, a great addition to any scientific toolkit!