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The Cal-Royal DORCO-1 Door Coordinator is a non-handed, automatic coordinating device designed to ensure the proper sequential closing of paired doors, with or without an astragal, in commercial and institutional settings. Ideal for frame openings between 60" and 72" wide—and extendable to 84" with an optional FB328 filler bar—this door coordinator complies with ANSI/BHMA A156.3, Type 21A standards for safety and performance. Constructed entirely from durable metal, it is available in a black prime coat or aluminum finish to match various architectural styles. The DORCO-1 includes an 18-5/8" filler piece (FB1858) for up to 72" door widths and is compatible with optional MB-4250 and MB-4750 mounting brackets for secure installation. This reliable and easy-to-install solution enhances door coordination and safety in high-traffic environments.