This durable helmet offers a large viewing field of 3.78" x 1.65" for a clear scope of the weld puddle, however, it is not meant to be used with TIG welding. Featuring a solar-powered battery, so the users won’t have to worry about changing batteries; This product is made to be an economical lens for the consumer welder. The auto darkening filter offers variable shade 9 to 13, sensitivity and delay adjustments; The helmet also includes two independent sensors, to automatically adjust to and suit your task. Available as 4 Jackson Safety Element Variable ADF Welding Helmets (WH40) per case; This product meets ANSI Z87.1 - standards and is CSA compliant. Established in 1933, Jackson Safety has built a century long reputation for delivering the most innovative safety solutions in the welding and personal protective equipment industries. When it comes to providing safety solutions with long-lasting value, durability and comfort, Jackson Safety has set the standard. Whether the need is for welding protection in a steel fabrication environment, head protection on a construction site, or hearing protection at an airport, Jackson Safety provides the widest range of safety choices to meet the needs of every job and every worker.