Factory Custom Magnetic Balls 3mm 4mm 5mm Bucky Ball Sets 216 Pcs Colorful Magnetic Artwork Toys Bending Welding

High-quality neodymium (NdFeB) magnetic spheres with a durable nickel plating. Perfectly spherical for smooth assembly, ideal for creative building, STEM education, or stress relief.

Key Features:
- Strong magnetism, corrosion-resistant
- Precision-made (3mm/5mm/6mm diameters)
- Safe for ages 14+ (not for young children)

Applications:
- Educational tools (geometry, physics)
- Office toys & fidget gadgets
- DIY art & model building