Physics Balls Set- Drilled Balls 25mm with 3mm Center Hole and a Storage Container. This is a case of 20 Sets.

GSC International 42003-12-CS Physics Balls Set – 12 Drilled Balls, 25mm Diameter with 3mm Holes – Includes Aluminum, Brass, Copper, Steel, Zinc, and Wood Case. 20 Sets 20-Complete Sets: Includes 12 drilled balls (25mm diameter) with 3mm center holes—2 each of aluminum, brass, copper, steel, zinc, and wood for diverse experimentation Durable Storage: Comes with a labeled plastic storage container to keep components organized and ready for repeated classroom use Versatile Applications: Ideal for pendulum and projectile motion demos, supporting instruction on energy transfer, force, and mechanics Density & Buoyancy Experiments: Allows students to compare mass and density across materials of the same size to explore volume-to-mass relationships STEM Learning Tool: Great for physical science and general physics instruction in classrooms, labs, or homeschool environments WARNING: This product can expose you to chemicals including styrene and lead, which are known to the State of Califo