They work great with my magnetic stirrer/hotplate so far with no problems. I didn't realize how tiny the smallest ones were and don't know if I'll ever find a use for them to be honest as the smallest ones are about the size of rice chips. but they come in a nice cardboard box with foam cut outs for storage. They also double as boiling pearls lol. Can't complain for $10 as they do what they say and I had no problems.
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