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RPB Z-Link Respirator and Tychem Face Seal C40, Green, Gray, Design Type: Respirator, Disposable: No, Filter Type: HEPA Filter, OV-AG-HEPA, Multi-Gas/HEPA, Nylon 66, Polycarbonate, Size: Standard, With Exhalation Valve: No, ANSI Standard: ANSI S3.19, Z89.