... installed. and convenient.maintenance as well as system testing of air pressure and airflow access panelProduct Name: INSPECTION DOOR, ACCESS PANELS ... , 300*300mm, 400*400mm, 450*450mm, 500*500mm, 600*600mm. Type :air conditioner partsAdvantage: Waterproof, Fireproof, weightless.Packing detail :cartonDelivery detail:3--4 ...