... steel,GCr15 and GCr15SiMn 3) Material of cages: brass, steel and nylon 4) Precision: P0, P6 ... ,P5 5) Suffixes: a) CA: Integral brass cage, double row symmetrical rollers, inner ring ... ride b) MA: Integral brass cage, double row symmetrical rollers, outer ring ride ... c) MB: Two piece brass cage, double row asymmetrical rollers, inner ring ride ...