650A Removable Mullion Constructed of aluminum, the 650A Removable Mullion includes 651 Stabilizers and imbedded Weather Stripping. Downloads Catalogs Instruction Manuals Promotional Sheets Product Templates Parts Manual Interested in this product? Contact Us Related products L980 & L980A Keyed Removable Mullions 980S & 12-980 Removable Mullions HC980 & 12-HC980 Removable Mullions