Hard sponge also refers to the degree of hardness within the sponge range. Generally speaking, a hard sponge is about 44-50 degrees (the higher the degree, the harder it will be)

Hard sponge also refers to the degree of hardness within the sponge range. Generally speaking, a hard sponge is about 44-50 degrees (the higher the degree, the harder it will be)

Anti-static sponge: It is processed by adding appropriate amount of conductive material into the plastic. The hard type is used to insert integrated circuit blocks, and the soft type is used for anti-static packaging.