Hello, our products note: 

This product is made of polyethylene plastic bag and bag, net weight is 25kg/ bag. 

When the storage please beware of rain moisture, fire and heat insulation. 

The product such as did not run out of time, please immediately sealed packaging, in order to prevent the surplus product moisture absorption. 

This product is non corrosive, low toxicity, does not belong to the dangerous goods, harmless to the environment.