... 810ml Dehumidifier Box:1,Calcium chloride and activated charcoal ;2,recyclable PE box;3,Moisture proof as well as ... of our home Dehumidifier Boxes:1.Material: Calcium chloride 74% or 94%globular,columnar activated carbon;2. ... 400g per piece3.It can be used about 3-6 mouth,this depend on season and the ... place 2-4 cases for a bigger one.3.when calcium chloride in the box are use up,please use ...