Deep groove ball bearings description: 1. Material: Gcr15 Chrome steel, Stainless steel or Carbon steel 2. Brand: TINMY 3. High quality with very smooth feeling, quality standard: ISO9001:2008 4. Noise level: Z1,Z2,Z3,Z4; Vibration level: V1,V2,V3,V4 5. Innder windage code: C0,C2,C3,C4,C5 6. Precision Grades: P0,P6,P5,P4,P2(ABEC1,ABEC3,ABEC5,ABEC7,ABEC9) 7. Seal form: OPEN,Z,ZZ,RS,2RS,N,NR 8. Range: 60series: 606 6044 62series:626 6244 63series:6300 6330 64series:6403 6416 67series:6705 68series:686 6824 69series:696 6924 and also inch series... Packing:Tube packing, or sigle packing: plastic bag + color box +carton + pallet Port: Any port in China Payment:Any payment, we can further discuss Delivery: around 30 days after confirm the order