Ferrofluid responds to the influence of magnetic fields and changes back when the magnetic influence is taken away. Ferrofluid is a black liquid made of nanoscale magnetic particles suspended in a carrier fluid. (Not speaker fluid)

Magfilm shows you the intricate shapes and patterns of magnetic fields that would otherwise be invisible. High definition Magfilm consists of a thin sheet of plastic coated in microcapsules containing nickel flakes. 

Keep a pen handy. Sticks anywhere a magnet will stick. Sleek tapered end design for optimal grip and writing comfort.

Ball bearing grade steel balls and nickel plated steel balls for general use. These ball bearings also make attractive targets for magnets.