... 1.Best quality and competitive price 2. low noise, long life 3. OEM service available 7000B High ... bearing material:GCr9,GCr15,GCr15SiMn high revolutions high accuracy low noise,small vibration Angular contact ball bearing Features:1) ... size is below 1600mmS7000 series ,SN7000 series,7000C series,7000AC series,7000B series,3000 series, 4000 series ,QJ0000 series,QJF0000 series and so onWe are ...