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The Simport M800 series of microscope slide mailer is made of polystyrene for durability and holds one, 25 x 75mm (1 x 3") microscope slide (sold separately). The mailer has a recessed compartment to hold the slide securely, and a tamper-evident snap-together mechanism allows connecting trays for mailing. The case contains four boxes, each with 50 slide mailers.
Simport Scientific manufactures disposable plastic labware. The company, founded in 1975, is headquartered in Beloeil, Quebec.