The I-CE LOCKING SYSTEMS Mild Steel Ball Bearing Hinge is a high-quality hinge designed for use with doors, featuring a CE7 fire rating indicative of safety standards compliance. The hinge is 76 mm in length and is coated in a satin nickel plating, providing a smooth operation and a stylish finish that complements a variety of door designs. With the FD30/60 certification, it ensures the hinge is suitable for use on fire doors rated for 30 to 60 minutes of fire resistance. The manufacturer code 451MSBB further assures its authenticity and adherence to specific design and manufacturing standards.