... fix free.soft vibration.Stable performance,can keep the same air flow under the resistance of HEPA filter.every piece can ... standardUSA federal standard 209EAir flow(m³/h)990130016001900Velocity(m/s)0.45±20%Purification levelclass 100Efficiency99.95%Clean bench shake half-peak ... , Biopharmaceutical,opto-electronics,moicro-electronics,caliche area.Other products Laminar airflow flow clean bench