3M 4255 Maintenance Free Half Mask Respirators - 3M 4279, The 3M 4279 Maintenance Free Half Mask Respirator FFABEK1P3 R D is a ready-to-use, maintenance-free half mask designed for effective and comfortable protection against a combination of organic and inorganic vapours, acid gas, ammonia and particulate hazards found throughout industry. 3M 4279 Maintenance Free Half Mask Respirator FFABEK1P3 R D
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