Detex F90KR 8FT 90 Series Key Removable Fire Rated Steel Mullion - 11 Gauge, 2x3 Tube with Top & Bottom Bracket - Ideal for Commercial Buildings, Schools, and Hospitals for Secure Fire-Rated Door Systems

Detex F90KR 7FT 90 Series Fire Rated Steel Mullion - Key Removable, 11 Gauge 2x3 Tube with Top & Bottom Bracket for Commercial Door Security & Fire Safety

Detex F90KR 8FT 90 Series Key Removable Fire Rated Steel Mullion - 11 Gauge 2x3 Tube with Top & Bottom Bracket - Ideal for Commercial Buildings, Schools, and Fire Exit Doors

Detex F90KR 7FT 90 Series Key Removable Fire Rated Steel Mullion - 7 Foot Height, 11 Gauge, 2x3 Steel Tube with Top & Bottom Bracket - Ideal for Commercial Buildings, Schools, and Fire-Rated Door Systems