Deluxe Welding Helmet - Auto Darkening - Solar. It Automatically changes filter screen from clear to dark in 1/20,000 Seconds. Operator can adjust the time the filter returns from dark to clear state. Provides protection to Full face and front of neck. It Utilizes high performance solar cells as power supply and has 2 built-in 3v lithium batteries as power back-up.

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More info: Astro Pneumatic 8070 Deluxe Auto Darkening Welding Helmet - Solar/Battery Powered