... , 22300, 23100, 23200, 24000, 24100 and 239002) Material of rings and rollers: chrome 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 ...