Physics Balls Set-Drilled Balls 25mm with 3mm Center Hole and a Plastic Storage Container.

GSC International 42003-12 Physics Balls Set – 12 Drilled Balls, 25mm Diameter with 3mm Holes – Includes Aluminum, Brass, Copper, Steel, Zinc, and Wood – With Plastic Storage Container Complete Set: 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 ⚠️ Proposition 65 Warning for California Residents: WARNING: This product may expose you to chemicals inc