Item NO:RCSA201~UCSA206Item NO:RCSB201~RCSB206RCSA200/RCSB200 Rubber mounted cartridge units,Eccentric/Setscrew lockingInsert bearing: Gcr15(AISI52100) steel,heat treated,precision ground,raceway superfinished, With rubber ring to reduce vibration and noise. Steel ball:G10 only. Retainer: Low noise refined cage. Lubricant: Low noise,high speed/load SHELL GADUS S2 V220 2 only. Locking type: Eccentric locking collar / Setscrew Phone: +86-592-580 8851 / +86-592-580 7618Email: sales@ldk-bearing.com ; benjamin@ldk-bearings.com