3CB1 - 4.5" x 4.5" Concealed Bearing Hinge Finish:Satin Bronze FS18S Height: 1-1/2"

FS18S Height: 1-1/2"

Standard 90-minute and 3-hour fire doors available

Track comes in 36" or 48" Lengths

Size: 1-1/8"w x 1-1/8"h

3CB1 - 4.5" x 4.5" Concealed Bearing Hinge Finish:Satin Bronze FS18S Height: 1-1/2"Ives 3CB1 4 1 2" x 4 1 2" 3 Knuckle Concealed Bearing Hinge, Standard Weight Hinges tested for cycles, weather, and environment to ensure high performance Recommended for medium weight doors (<150 lbs) Recommended for medium frequency usage (<400 cycles per day) Made with two concealed nylon bearings Recommended for use with a door closer Packed with fasteners for hollow metal and wood doors UL Listed (3 Hour Fire Rated) UL Classified for windstorm