90° Extra Wide Paper-Faced Metal Outside Corner Bead, 8 ft. Used for finishing 90 degree outside corners. Dimensions: A,D - 5/8 in., B,C - 13/16 in., 8 ft. long Benefits: Strong impact resistance. Forms superior bond with drywall compound. Creates perfect 90 degree corners. Reduces cracking along edges. Suitable for use on any thickness of drywall. Sheetrock® Paper-Faced Metal Corner Bead Brochure