This welding mask features 1/1/1/2 Optical Clarity. [Smart Darkening Filter ] - 4 independent smart sensors provide auto-darkening function in millisecond. No matter what grinding or welding applications, like SMAW, MIG, TIG, GTAW, etc, HZXVOGEN welding hood is specially designed to resist 99% of harmful light and prevent your face from injury.
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