Hager BB1279NRP Standard Weight Ball Bearing Hinge
4-1/2" x 4-1/2" Five Knuckle, Full Mortise, Steel with non-removable steel pin.
Finishes Available: Prime Coated, Bright Brass, Satin Chrome, Bright Chrome, Antique Bronze Lacquered
For use on medium weight doors or doors requiring medium frequency service. Two ball bearings. Non-rising removable pin with button tip and plug. Complies with NFPA80 requirements for use on fire rated door assemblies.