... 20mmx20mm,25mmx25mm,30x30mm made of PVC,adhere to the fiberglass mesh. PVC Corner Bead with fiberglass mesh Specifications ... as below:1.made of PVC,adhere to the fiberglass mesh.2.thickness: ... 1.0-2.0mm3.wing width of pvc corner bead:18x18mm,20x20mm,25x25mm,30x30mm,4. ... speed,2.improve project's quality 3.solve long-existed quality common faults that open corner is ...