Surface Roughness : Ra 0.2 Torque Capacity : 7 x 19 x 6 mm Structure : deep groove Model Number : 607ZZ Material : Chrome Steel GCr15 Bearing Model : 607ZZ Bearing Sizes : 7 x 19 x 6 mm ID (inner diameter) : 7mm OD (outer diameter) : 19 mm Width : 6 mm Bearing Grade : ABEC-7 Bearing Characteristics : Silent operation and high speed Bearing Material : Bearing Steel GCr15 Ball Material : Bearing Steel GCr15 Bearing Type : Ball bearing Welcome to Lingfeng Store