... >68% Hardness (Moh's): 5-74) Packing: 1.Using double-deck package, the inner is polythene film and its thickness is ... not less than 0.5mm,the outer is pe-deck package, the inner is polythene fim and its thickness is ... weight of each is 25±0.2kg. 3.Using double-deck package, the inner is polythene fim and its thickness is ...