SAF M filters are high velocity washable type permanent air filters suitable for HVAC and grease filtration applications. The media used is plated layers of aluminium or galvanized mesh arranged in multi layers and encased in an aluminium or galvanized frame. Additional expanded metal grids on upstream and downstream sides provide media support and strength to the filter. These filters have very low resistance to the airflow. Complete stainless steel construction is also available as an option.