... ,25*25,20*20mm,thickness:0.2-0.5mm, Board casing beads are square cornered metal beads that fit snugly over ... building board for protection at abutments.no setting is required.casing beads are manufactured from 0.5mm ZINC ANNEAL material,and ... ;P07 13mm BUILDING BOARD;P08 16mm BUILDING BOARD. board casing bead,drywall casing bead .Standard in AustraliaAngle accord with fast installation,Galvanized ...