the same poles repel, different poles attract

1. The nature of the magnet: heatable magnetic filter, can attract iron items.
2. magnets having magnetic poles, each magnet has two kinds of N poles and S poles are in pairs.
3. The temporary and permanent magnet magnet: When a ferromagnetic material is magnetized, easy to lose magnetic properties, it is called a temporary magnet (for example: iron); when the ferromagnetic material is magnetized, not easy to lose magnetism nature, it is called a permanent grid magnet (for example: steel).
4. When two magnets close to each other, the same magnetic poles repel each other away, do not attract the same pole will stick to each other. So: the same poles repel, different poles attract