Sphere Neodymium Magnets Rare Earth N33,n35,n38,n40,n42,n45,n48,n50,n52, (m, H, Sh, Eh, Uh,ah ) 

You can create huge number of shapes and models according to your imagination by this amazing NeoCube. Using the NdFeB Magnet Spheres (Neocube) to create shapes could let both hemispheres of your brain get enough exercise. It will not only exert your creativity and spatial abilities, but also math skills and even your logic.
Description:
1) Rare Earth magnet has superior magnetic properties than other magnets
2) Higher unit magnetic properties
3) Smaller size and lighter weight in designing devices
4) Mostly an iron based alloy, NdFeB type rare earth magnet is much more prone to surface oxidation or rust, and elimination. Users should consider magnet coating, plating or suitable surface treatment

5) Less prone to chipping during handling
6) Lower temperature coefficient of magnetic properties than ceramic, higher than SmCo type rare earth magnet
7) Irreversible loss at high temperature
8) Types: N30, N33, N35, N38, N40, N42, N30M, N33M, N35M, N38M, N40M, N27H, N30H, N33H, N35H, N37H, N27SH, N30SH, N33SH, N35SH, N25UH,   N28UH, N30UH, N35SH, N38, N45, N48, and N50
9) High energy ranging from 26MGOe to 54MGOe with wonderful coercive force
10) Less expensive, and mechanically stronger and less brittle than SmCo
11) Density: 7.5g/cm2
12) For most applications, coating or plating is recommended
13) Advantages:
     a) High energy
     b) Very high Hc and Hci output
     c) More economical than SmCo
     d) Wonderful performance at ambient temperature
14) Disadvantages:
     a) Working temperature is below 240^oC
     b) Prone to oxidation than other magnet alloys
15) Widely used in apparatus and instruments where a strong magnetic field is needed,
      including motors, sensors, microphones, electro-acoustics, magnetic separation,
      magnetic suckers and magnetic therapy.

The sample picture: