120mm – up to 1,500 RPM and 41.8 CFM of airflow, 140mm – up to 1,250 RPM and 50. Anti-vibration rubber dampers help reduce vibration noise and transfer. 120mm – up to 1,500 RPM and 41.8 CFM of airflow, 140mm – up to 1,250 RPM and 50.2 CFM of airflow.
eBay