Welding Helmet Lens Compatible with Brand Viking Compatible Grainger Part Number 807RV9 Compatible Manufacturer Part Number K3034-5 Compatible with Series Viking 3350 ADV Diopter Strength +1.0 to 2.5 Features 4C Lens for Clear View of Welding Arc For Use With Viking 3350 ADV Series Welding Helmet Lens Color Purple Magnification No Magnifying Power +1.0 to 2.5 Plate Length 4 1/2 in Plate Thickness 0.36 in Plate Width 5 1/4 in Standards ANSI Z87.1 AS/NZS 1338.1 CSA 94.3 EN 379