Hi,
They are mainly used for cameras and the likes. You can find the at most camera specialist shops and they are not really expensive. They come in sizes from small to large cabinets.
when we build our new house here I intend to buy a wardrobe sized one for multiple items as currently we are running at around 80 to 85% humidity here.
I currently use two brands, Eureka and Andbon which both appear to be reasonable quality and so far I have not had any issues.
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