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Air sampling pumps for providing airflow in collecting hazardous air contaminants onto or into sampling media; sampling media, namely, sorbents held inside glass or stainless steel tubes, filters held inside plastic cassettes or restrictive (size-selective) metal or plastic samplers that separate contaminants by size, treated papers held inside small plastic housings with multiple holes through which air contaminants diffuse, liquids held inside glass burets in which contaminants become entrained, and sample bags made of plastic film into which air is pulled with aforementioned air sampling pumps to trap hazardous air contaminants; and accessories, namely, airflow calibrators and flowmeters for calibrating sampling pump flow rate, polymer tubing for connecting sampling pump to sampling media, battery chargers for charging sampling pump batteries, hard plastic or cloth pump cases for holding pumps, plastic or metal tube holders for facilitating connection of sorbents held in glass tubes to sampling pumps, plastic constant pressure controllers for regulating pressure in sampling trains, plastic negative pressure chambers for filling sampling bags without the air passing through a sampling pump, plastic cassette holders for facilitating connection of filters held inside cassettes to sampling pumps, plastic or metal tubing adapters for adapting outlets of sampling media to different tubing diameters, metal cassette openers for opening plastic cassettes, and plastic calibration jars for facilitating calibration of sampling pumps with sampling media in line. All items are available separately for the overall function of facilitating the use of aforementioned air sampling pumps and sampling media for the collection of hazardous air contaminants