... the top part of spray booth, prefiltration throughair filter program, diffluent equallyType: supply pads or rolls size ... Filter Cotton, Ceiling Filter, Floor Filter, Heat-Resistant Air Filter, all kinds of Pocket, Plank, Foldaway Filters, Primary Filter, Secondary Filter , HEPA Filter, ... HVAC(heating & ventilation application) 600G ceiling filter for spray booth/roof filter (full gule ) (manufacture)