... to clean 3.System testing of air pressure and airflow Aluminium access panel1.Product Name: INSPECTION DOOR, ACCESS PANELS,2.Material : Aluminium alloy and ... , 400*400mm, 450*450mm, 500*500mm, 600*600mm.4.Type :air conditioner parts5.Advantage: Waterproof, Fireproof, lightweight but strong,precision component,perfect ...