5mm Magnetic Colour Balls Pack of 216

Specifications

• Magnet Material: Neodymium (NdFeB)
• Diameter: 5mm (per sphere)
• Quantity: 216 Pieces
• Color: Rainbow / Multicolored Metallic
• Coating: Multi-layer Electroplated
• Packaging: Round Metal Storage Tin
• Shape: Spherical
• Maximum Operating Temperature: 80°C

Unlock New Capabilities

• Past Projects If you've already experimented with basic ferrite magnets on a whiteboard or played with simple plastic fidget toys, you already understand the basics of magnetic attraction — which means you're perfectly ready to graduate to constructing complex, free-standing neodymium structures.
• Feature Upgrade This 216-piece set of 5mm spheres unlocks the ability to build intricate 3D polyhedrons, model molecular structures, construct wearable magnetic jewelry, and create advanced kinetic desktop toys. These are complex, weight-bearing designs you simply cannot achieve reliably with weak ceramic magnets or poorly coated marketplace spheres.
• Effort Level & Minimum Hardware
• Effort Level: Beginner

Minimum hardware to get started:

• A clean, non-ferrous flat surface (like a wooden or glass desk): building on a steel or iron table will cause the spheres to instantly snap to the surface instead of forming your intended design.

Package Includes:

• 216 × 5mm Multicolored Neodymium Magnetic Spheres
• 1 × Round Metal Storage Tin

Frequently Asked Questions

• Can I build with these magnetic balls on a steel desk?
  No, the strong magnetic pull will cause the spheres to instantly stick to the ferrous desk, making it impossible to form free-standing 3D structures.
• Are these compatible with other 5mm magnetic sphere sets?
  Yes, as long as your existing set features true 5mm neodymium spheres, they will interlock perfectly with this set.
• Can I use these underwater or in an aquarium?
  It is highly discouraged, as prolonged exposure to moisture can degrade the metallic coating and cause the internal neodymium to rust.
• Do these stick to aluminum or copper surfaces?
  No, neodymium magnets only attract to ferrous metals such as iron, steel, and nickel.
• How strong is the magnetic pull of each 5mm ball?
  While exact pull force is difficult to measure per sphere, they are exceptionally strong and a single ball can easily hold a vertical chain of over 50 other spheres.
• Will the magnets lose their strength over time?
  No, neodymium is a permanent magnetic material and will lose less than 1% of its magnetic strength over 10 years.
• Are these strong enough to hold up heavy tools on a wall?
  No, these are designed specifically for desktop geometric modeling and light holding, not for heavy-duty industrial mounting.
• How do I cleanly separate a line of spheres without ruining the shape?
  Use a thin plastic card, like an old credit card, to slice between the spheres and break the magnetic bond cleanly.
• Why do my magnetic sheets keep buckling when I try to join them?
  You are likely forcing repelling magnetic poles together; simply flip one of the sheets 180 degrees so they attract and naturally interlock.
• Do I need any special tools to build complex shapes?
  No dedicated tools are required, but a plastic splitting card makes slicing and folding geometric builds significantly easier.
• How should I clean the magnetic balls if they get dirty?
  Wipe them gently with a dry, clean microfiber cloth; never use water or harsh chemical solvents.