... beads(corner bead): standard angle bead, stop bead and strengthened plaster bead. According to material,devided into: GALVANIZED,STAINLESS STEEL,PVC COATED ... ,ALUMINUM,CARBON STEEL ANGEL BEAD. According to processing methods,devided ... penetrate through the bead to the drywall. The bead becomes part of the wall. Perforated corner beads are adapt ...