Bore Diameter (Inner ID): 60 mm (2.362 in) Outside Diameter (OD): 110 mm (4.331 in) Overall Width: 22 mm (0.866 in) Closure Type: Double Shielded (SFF indicates metal shields on both sides to resist contamination) Internal Clearance: C3 (greater than normal radial clearance for thermal expansion) Precision Rating: ABEC 1Interchange Equivalents: Industry-standard 6212-ZZ C3 or 6212-2Z