Specifications Dead Burnt Magnesite--DBM-87/DBM-90 Dead Burnt Magnesite Specifications:- MgO: 87 to 90% / 90% +; CaO: 2.5% max, SiO2: 4.5% max, Fe2O3: 2.5% max, Size: 0 to 3 mmor3 to 5 mm. Packing: 1Mt Jumbo Bags.