Feature: 1.Collecting 1 to 5um micron particles 2.Large dust holding capacity 3.High airflow rate 4.Low airflow resistance 1. This model`s dimensions as below:592*592*292; 295*595*295;2.Nominal airflow : 1800-3600m3/h3. Initial resistance:120PARemark:may customize according to users`specific requirements chemical air filter