CertainTeed LEVELLINE® Flexible Corner Trim outperform at every angle. Levelline Flex Levelline Flex is a corner bead that features a polymer core with a built-in flexible hinge that flexes to any inside or outside corner angle. Levelline Flex is perfect for cathedral ceilings, inside and outside corners, bay windows and archways because it easily adjusts to all angles, eliminating pre-measuring and pre-creasing, saving valuable installation time.
