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NIOSH Items: We only sell brand new respirators, filters, and dust masks from US based manufacturers. Since it can be difficult to determine if a respirator or mask has been used or even just tried on, for the protection of our customers, we do not accept NIOSH returns.
Plastic retainer used to attach either the 5N11 or 5P71 prefilters to 6000 series cartridge. (20/box)