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The Speedglas 100 welding helmet with variable tinted auto-darkening filter Variable dark shade 8-12 (100-V) Most recommended for MMA, MIG / MAG and TIG welding (> 20 A) and grinding. Can be locked in the light shade, eg. During grinding Delay function to set opening time from dark to light Three sensitivity levels Headrest with flexible lock for precise mounting Compatible with most 3M Disposable respiratory protection against weld particles