Hager
Hager BB1168NRP Heavy Weight Ball Bearing Hinge
4-1/2" X 4-1/2" Five Knuckle, Full Mortise, Non-removable pin, Steel with steel pin.
Satin Chrome
For use on heavy weight doors and doors requiring high frequency service. Four ball bearings. Complies with NFPA80 requirements for use on fire rated door assemblies.