Item: 682ZZ 2x5x2.3mm 683ZZ 3x7x3mm 684ZZ 4x9x4mm 685ZZ 5x11x5mm 686ZZ 6x13x5mm 687ZZ 7x14x5mm 688ZZ 8x16x5mm 689ZZ 9x17x5mm Structure: Deep Groove Material: Bearing Steel Closures: Metal Seal Lubrication: Grease Magnetic: little Hardness: 58HRC Corrosion Resistance: General Clearance: C0 Grades: ABEC-7