1) Series: 21300 series, 22200 series, 22300 series, 23200series, 23000 series,
24000 series, 23100 series,24100 series and 23900 series
2) Material of rings and rollers: chrome steel; GCr15 and GCr15SiMn
3) Material of cages: brass, steel
4) Precision: P0, P6
5) Suffixes:
a) CA: Integral brass cage, double row symmetrical rollers, inner ring guide
b) MA: Integral brass cage, double row symmetrical rollers, outer ring guide
c) MB: Two piece brass cage, double row asymmetrical rollers, inner ring guide
d) CC: Two piece steel cage, double row symmetrical rollers, inner ring guide
e) E: Two piece enforced cage, double row symmetrical rollers, inner ring guide
e) K: Tapered bore bearing, the taper is 1:12
f) K30: Tapered bore bearing, the taper is 1:30
g) W33: With lubrication groove in outer ring, with three oil holes
h) C2/C3/C4: Internal clearance series: C2, C0, C3, and C4

Any inquiry from you, please kindly let me know.
Samples & Catalogs & Quotation is available upon your inquiry.