Advantage Series, Patriot, Auto Darkening Welding Helmet, Expanded Ultra Clear Viewing Area, Light Weight 16.22 OZ, High Impact Resistant Nylon, External Shade Selector, 5 Point Adjustable Geared Headband With Sweatband Mechanism, 7.70 SQIN 3.93" x 1.96", Expanded Viewing Area, DIN 9 To 13 Variable Shade Selections TIG Operable To 8A, 4 Optical Arc Sensors, 1/1/1/2 Optical Clarity Rating, 1/16,000 Per Second Switching Speed.