... OPTI belt roots blower. 2.Sweden SKF bearing roots blower. 3.Low noise roots blower 4.Passed ISO9001 certification Product types:( ... 1)Roots Blower:MFSR40, MFSR50, MFSR65 ... /min Pressure: 9.8kpa-73.5kpa(3)High-Pressure Roots Blower: MFSR50H, MFSR65H, MFSR80H, MFSR100H, MFSR125H, MFSR150H, MFSR175H, ...