CEMCO’s #66 expanded flange casing bead formed to a 90° for applications at corners, plastered finish edges and corners or when adjoining dissimilar material. Absorbs movement due to expansion and contraction of plastered walls. Provided with an expanded flange for proper keying and easy application. No.66 Expanded Flange Casing Bead is fabricated from 26 Gauge galvanized steel in standard G60.