Product Description
The 3M™ 4000 Series Reusable Half Face Masks are a range of ready-to-use, maintenance-free half face masks, designed for effective and comfortable protection against many gases, vapours and combination particulate hazards found throughout industry. Utilizing unique filter technology allows a very low-profile for undisturbed view to make your work life more comfortable.

Key Features
• Disposable, maintenance free half mask.
• Soft, textured face seal to provide a more comfortable fit to the face.
• Lightweight and well balanced to ensure comfort during long periods of work.
• Twin inhalation valves and large, bonded carbon filters to reduce breathing resistance, complimented by a low resistance parabolic exhalation valve to reduce heat build-up.
• Low profile design allows for better peripheral vision and compatibility with 3M™ Eyewear range.
• Easy to use as no need for assembly, maintenance or record keeping.
• Easy and secure fitting of neck strap and adjustment of head cradle.
• Optional overspray guard prolongs the life of the particulate filter when paint spraying.
• Maximum product weight of 320 grams.

Applications
The 3M™ 4000 Series Reusable Half Face Masks come in a variety of different product options:
• 3M™ 4251 (FFA1P2 R D) provides protection against organic vapours (good warning properties and b.pt. > 65°C), up to 10 x Threshold Limit Value (TLV) or 1000 parts per million (ppm), whichever is lower, and 12 x TLV for particulates.
• 3M™ 4255 (FFA2P3 R D) provides protection against organic vapours (good warning properties and b.pt. > 65°C), up to 10 x TLV or 5000 ppm, whichever is lower and 50 x TLV for particulates.
• 3M™ 4277 (FFABE1P3 R D) provides protection against organic vapours (good warning properties and b.pt. > 65°C), inorganic and acid gases up to 10 x TLV or 1000 ppm, whichever is lower and 50 x TLV for particulates.
• 3M™ 4279 (FFABEK1P3 R D) provides protection against organic vapours (good warning properties and b.pt. > 65°C), inorganic and acid gases and ammonia, up to 10 x TLV or 1000 ppm, whichever is lower and 50 xTLV for particulates.