... -optical technology of Germany. 1. Model Of Welding safety helmet:EH-403, Configuration ADF Model: EF9848.2. ... : yes.3. Material & Weight: PA/ PP, 0.56kgs.4. Viewing area: 98*48mm.5. ADF Frame Size:110 ... lithium batteries be changed.10.Switching time of Welding safety helmet:a) Light to dark: 1/25,000s ... arc welding/Gas welding.15. Colour of Welding safety helmet: blue,green,silver,black,yellow,red, And ...