... .soft vibration.Stable performance,can keep the same air flow under the resistance of HEPA filter.every piece can ... 650*8001560*650*800Production/ Inspection standardUSA federal standard 209EAir flow(m³/h)990130016001900Velocity(m/s)0.45±20%Purification levelclass ... , Biopharmaceutical,opto-electronics,moicro-electronics,caliche area.ISO certificates: Laminar alrflow hood clean bench for Lab equipment