Auto-Darkening Welding Helmet ideal for electric welding, argon arc welding, gas shielded welding and tinsoldering, etc Auto-Darkening Welding HelmetVRKM8000-1 ... Lifetime: 5, 000 Welding Hours)Viewing area (mm): 100 x 49Weight: 450GMaterial of helmet: NYLONAvailable color: Blue ... and delay time.8. Optional grinding and welding manner. screening glass front panellight filterrear panelsensitivity ...