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Specification: . Material: Engineering plastic shell, it is tested by heat resistant and anti collision material. Auto-Darkening welding Helmets are designed to protect the eyes and faces from spark, spatter, and harmful radiation under normal welding conditions.. Suitable for high welding operation temperature, good choice for Welding . Viewing area: 3.62 x 1.66 in (92 x 42 mm),Fully Automatic Power On/Off.. Anti-UV can protect your eyes from UV harm. Eye clear and alleviate visual fatigue, natural color . Eliminate dazzle light; Lens material: liquid-crystal display , LCD. Permanent Shade DIN19. Response time(bright to dark):