Welding Helmet Mask auto darkening suitable for MIG, TIG and Arc (MMA/GMAW) electric welding. Adjustable delay time and sensitivity for working in a range of environments. Comfortable 4-way adjustable padded headband for comfortable fit. Dual light sensors switch from light to dark in 1/15,000 second. DIN shade 4 (light) / adjustable DIN shade 9-13 (dark), DIN 16 UV and IR protection. Certified to EN379 and 175.