The Alpha Sentinel large P3H gas filters protect against non toxic dusts and both oil and water-based particulates, with an ergonomic design that delivers incredibly low breathing resistance. Features and Benefits Filter position allows for a panoramic view with no obstructions Filters are fitted with a simple click and connect action for operator ease Supplied seal check covers double as particulate filter holder for combination filter for convenience Typical Applications Manufacture of Batteries (Ni-Cad) Construction Infection Control Metalworking Mining Pharmaceutical Industry Ship Building/Repair Underground Civil Engineering Disposal of Waste Woodworking Industry Standards Tested to EN136:1998 Class 2