Raw magnets that aren't coated with an additional material are generally grey in colour. Ferrite and samarium cobalt magnets usually do not require any extra coating as they are already resistant to corrosion. Therefore, this range of grey circular disc magnets consists entirely of ferrite and samarium cobalt disc magnets. As well as being resistant to corrosion, samarium cobalt and ferrite magnets also have high maximum operating temperatures. In this section you will find disc, ring and pot magnets.