Test for asbestos presence in the air with PCM cassettes. Each 25-mm, three-piece housing is injection molded in-house from high-quality polypropylene and is individually assembled and preloaded under stringent quality control standards, ensuring you get accurate results. Once assembled, each cassette undergoes an inspection for the correct filter/pad combination before being shipped out. Random lot sample testing is performed daily by an independent laboratory to ensure low background fiber counts. Laboratory results are available upon request.