... Standard products with fast delivery Competitive price in nice quality K,KK,K...ZW,KBK,KZK Needle retainer assemblyAs for the particularity ... to the samples.. BK, HK, BA, BCE,SCE, F, HF, K, KZK, KBK, NK, RNA, NKI, NA, RNAV, NAV, AXK, NTA ... WS WS81102~WS81132 15~160 ZS ZS1127~ZS141199 15~160.. k series needle bearing