Allegro Industries, 9904-W, Deluxe Supplied Air Shield & Blue Welding Helmet w/No Flow ValvePerformance proven and a cost effective system used by foundries, aluminum plants, mines, chemical plants, refineries, auto manufacturers, metal working and fabrications. This helmet offers protection from airborne contaminates including hexavalent chromium applications, flying debris, sparks, chemical and molten metal splashes. The welding shield flips allowing user to grind and clean metal looking through clear ANSI face shield. Equipped with variable shade, autodarkening lens, shade 9-13. Complies with ANSI Z89.1 Type 1 Class G for head protection; ANSI Z87.1+ for face-shield/eye protection. NIOSH approved.Protection Factor:A Certified 3rd Party Testing Lab was contracted to conduct a Simulated Work Place Protection Factor Study on the 9904 Series Respirator. The results of this study indicated that 9904 samples tested yielded 5th percentile protection factors greater than 1,000 thus allowing Allegro to claim that the 9904 Series Respirator qualifies for an APF of 1000 as permitted by OSHA.Air Shield/Helmet:NIOSH approvedHead protection: ANSI Z89.1 Type 1 Class GMade of ABSLow profile and lightweight (3.625 lbs) (visor alone: 0.485 lbs)Quick release suspension for easy cleaningMade in USALens (Shield):Eye Protection: ANSI Z87.1-2003Protection Factor: APF 1000Made of anti-fog polycarbonateViewing area: 15' X 6.75' (38.1cm X 17.1cm)Visor (Welding Helmet):Made of glass filled polyamide (Nylon)Variable shade, auto-darkening lens, shade 9-134.25' X 3.5' (10.8cm X 8.9cm)Auto-Darkening Filter (ADF) - Welding Helmet:Good for all welding processes including TIG and TIG pulsingADF lens, shade 9-13Features both optical and magnetic arc detection systemsCapability to detect light and magnetic waves that occur during weldingOptomagnetic sensors can be adjusted from zero to six feet in rangeSolar powered with dual sensorsActive viewing area: 3.8' X 1.6' (9.65cm X 4.06cm)Neck Cape:Made of Stedprene (a fire retardant, polyurethane coated poly cotton fabric)Added comfortProtects user's neck from falling debrisDown Tube & Flow Controllers:Corrugated flexible and lightweight glass-filled nylon for greater comfort and less fatigueEasily interchangeable to Low Pressure or High Pressure.Low profile nylon adjustable waist belt.