1) types: 60 series, 62 series, 63 series, 64 series.
2) corresponding models range :605-6020 , 623-6220 , 6300-6320 , 6403-6413
3) material: gcr15 (chrome steel) -china, (aisi) 52100-american, (din) 100cr6 -germany, carbon steel, iron.
4) shield / closure: plain (open), z, zz, rs, 2rs, 2zr, 2z.
5) vibration and noisy level: z1, z2, z3, zv1, zv2.Zv3.Z1v1.Z2v2.Z3v3.
6) precision level: abec-1, abec-3, abec-5, abec-7.
Packing a: barreled package+outer carton+pallets b: single box+outer carton+pallets c: tube package+middle box+outer carton+pallets d: according to your's requirement
