... m3 thickness:3MM--12MM edge: square edge (without facet), Export Mgo board to Korea 900*1800 MMAlso called : Magnesium oxide board ... ,Glass magnesium board, Magnesium fire-proof board,Mgo boardWe are specialized magnesium oxide board ,glass magenesium board manufacture ... glass magenesium board for 3 years .Specification :1. purity :mgo 38-46%,mgcl 9-13%,palster of paris 3-5 ...