bearing Bearings 10PCS Ball Bearings 603ZZ Size: 3mm X 9mm X 4mm Model603ZZ Dimensions Bore (d)3 mm Diameter (D)9 mm Width (B)4 mm Seals Type ZZ (Two side metal) Quality P6.Z2 / ABEC-3.Z2 Material Bearing steel (Gcr15) Quantity10 PCS