Technical specs Item: 1614ZZ Structure: Deep Groove Material: Bearing metal Bore Dia (d): 25.4mm Outer Dia (D): 31.75 mm Width (B): 22.22mm Closures: Metal Seals Lubrication: Grease Magnetic: little Hardness: 58HRC Corrosion Resistance: General Clearance: C0 Grades: ABEC-7