980S & 12-980 Removeable Mullions Intended for general usage, the 980S and 12-980 Removeable Mullions are constructed of steel and ideally suited for store fronts and schools. Available with a fire rating. Downloads Catalogs Instruction Manuals Promotional Sheets Product Templates Parts Manual Interested in this product? Contact Us Related products HC980 & 12-HC980 Removable Mullions L980 & L980A Keyed Removable Mullions EL980 Electrified Keyed Removable Mullion