Use for metal doors, minimum 1.75" door thickness, four hours fire rating on steel doors, for maximum aperture size 18" x 60", Size: 12"W x 12"H x .55" T

Use for metal doors, minimum 1.75" door thickness, four hours fire rating on steel doors, for maximum aperture size 18" x 60", Size: 16"W x 10"H x .55" T

Use for metal doors, minimum 1.75" door thickness, four hours fire rating on steel doors, for maximum aperture size 18" x 60", Size: 18"W x 08"H x .55" T

Use for metal doors, minimum 1.75" door thickness, four hours fire rating on steel doors, for maximum aperture size 18" x 60", Size: 18"W x 10"H x .55" T

Use for metal doors, minimum 1.75" door thickness, four hours fire rating on steel doors, for maximum aperture size 18" x 60", Size: 18"W x 18"H x .55" T

Use for metal doors, minimum 1.75" door thickness, four hours fire rating on steel doors, for maximum aperture size 18" x 60", Size: 18"W x 36"H x .55" T

Use for metal doors, minimum 1.75" door thickness, four hours fire rating on steel doors, for maximum aperture size 18" x 60", Size: 18"W x 60"H x .55" T

Use for metal doors, minimum 1.75" door thickness, four hours fire rating on steel doors, for maximum aperture size 18" x 60", Size: 20"W x 20"H x .55" T

Use for metal doors, minimum 1.75" door thickness, four hours fire rating on steel doors, for maximum aperture size 18" x 60", Size: 24"W x 24"H x .55" T