1.Arc welders. 2.Viewing area: 90*40mm. 3.Variable shade: ... DIN 13. 4.Light to dark: 1/25,000s. Arc welders helmets (EH-224/EF9040)1. Model:EH-224/EF9040, ... cells, two lithium batteries be changed.10. Switching time of Arc welders helmets:a) Light to dark: 1/25,000s.b) ... .14. Application:Mig/Tig/argon arc/arc welding/Gas welding.15. Colour Of Auto-darkening Arc welders helmets: blue,green,silver,black, ...