Item NO:UKFL205~UKFL216UKFL+H Standard duty,Tapered bore,Adapter sleeve locking,Cast gray iron housing. Cast DUCTILE iron housing available upon request.Housing: HT200 cast grey iron. Zerk fittings: Zinc plated A3 steel. Insert bearing: Gcr15(AISI52100) steel,heat treated,precision ground,raceway superfinished. Steel ball:G10 only. Retainer: Low noise refined cage. Lubricant: Low noise,high speed/load SHELL GADUS S2 V220 2only. Outer ring with grease groove and holes,at same side of adapter sleeve Phone: +86-592-580 8851 / +86-592-580 7618Email: sales@ldk-bearing.com ; benjamin@ldk-bearings.com