... noise 3.Good quality,service and price 4.ISO9001:2000 deep groove ball bearing low vibration,low noiselow ... friction moment,long service lifehigh swiveling accuracyexcellent sealing ... 499502H16000Series:16001,16002,16003,16005,16007Non-standard bearing series:Clutch bearing,Special purpose bearing,N,NR snaping ,Handware/Axle sleeve, ...