The surface of the door rails are kept clear by moving the lock and mortise cylinder into the Continuous Mounting Bar. Locks can be located at top, bottom or both for added security. 1301 Series Display Case Doors and Sidelites are available with 3/8", 1/2", 5/8" or 3/4" (10, 12, 16 or 19 mm) glass, either tempered or laminated, in clear, tinted, low-iron, anti-reflective, or specialty glass upon request. For additional information contact CRL Technical Sales Department.