CertainTeed No-Coat® Flexible Corner 450 (4-1/2") Flexible drywall corner bead that can conforms to any inside or outside angle. Dimensions: 4-1/2 in. x 100 ft. roll (Wide) Application: For runs longer than 10', such as vaulted or cathedral ceilings, or on larger gaps and poorly framed corners. Benefits: Ideal for any angle of any length. Extra wide flange for greater stiffness. Stays straight and maintains desired angle due to memory-free hinge. Substantial impact resistance and prevents cracking. Will not split or dent and resists abrasion. Data Sheet