... drywall casing bead,Standard in Australia,size30*30,25*25,20*20mm,thickness:0.2-0.5mm, Board casing beads are ... beads that fit snugly over the edge of the building board for protection at abutments.no setting is required.casing beads are ... 6mm BUILDING BOARD;P05 10mm BUILDING BOARD;P07 13mm BUILDING BOARD;P08 16mm BUILDING BOARD. board casing bead,drywall casing bead .Standard in AustraliaAngle accord ...