Schweissabsauganlage, mobil FEATURES Generous Airflow: 735 CFM with LFA 3.1/4.1 extraction arm. CFM level is dependent upon arm length, fan type and system maintenance. Internal spark arrestor: Functions as a pre-filter for larger sized particulate. Prevents sparks from reaching the filter. Optimal motion and reach for work area: Choose from a variety of extraction arm models or select a hose/hood set. Filter status indicator: Visual guide to remaining filter life.