... Ball Bearings 6313 2RS 1.Material:GCr15 SiMn 2.Low Noise, ZV2 Grade 3.Bearings OEM service 4.ISO9001:2008 HYIB ... Low Noise Deep Groove Ball Bearings 6313 2RS1. Bearing Material:chrome steel2 ... sizes and shapes. It is suitable for precision instrument, low noise electromotor, automobile and motorcycle, etc. Brand name SKF FAG NTN ...