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 980 & 980A Removable Mullions 988 Surface Bolt Kit EL980 Electrified Keyed Removable Mullion