Review on 🧲 Iron Filing Bottle: Ajax Scientific's Essential Tool for Magnetic Experiments by Marcel Robinson

Perfect for this purpose. These sawdust are very thin like flour. This makes them very sensitive to magnetic fields and enables impressive demonstrations. The bottle has a perforated inner lid to distribute for your display. The previous complaint about a "dirty tampon" is not true. There is a cotton swab in the bottle, and the "sludge" is the iron supply. Exactly what you expect. It's easy to pull out the shaker's inner cap and replace the sawdust in the bottle when you're done using it.