Auto Darkening Welding Helmet; Many color for your choose; Different designs for your reference Auto Darkening Welding HelmetTechnical Parameter: DX-300F DX-350D DX ... ×90×9mm 110×90×9mm Arc Sensor:2 //Light State:DIN 4 //Dark State:Fixed shade 10(11 ) Variable shade, 9 ~13 Variable shade ... :1/5000S,from Light to Dark 1/15000S,from Light to Dark 1/15000S,from Light to Dark Dark to Light:0.25-0 ...