... ×45mm, 50×50mm, 60×60mm, 70×70mm, 80×80mm.The corner bead isa new building material, and specially designed to protect the ... smoother and speed up the construction period. The corner bead is made of high-strengthen polythene, its advantages include anticorrosion, ... , and excellent mechanics function; It is easy to use the corner bead without ruler, at the same time, it saves labor and ...