Detailed Product Description Spherical roller bearing features:1) Series: 21300 series, 22200 series, 22300 ... MA: Integral brass cage, double row symmetrical rollers, outer ring ridec) MB: Two piece brass cage, double row asymmetrical rollers, inner ring ... rided) CC: Two piece steel cage, double row symmetrical rollers, inner ring ridee) CTN1: double row symmetrical rollers, nylon cagef) K: Tapered ...