Auto darkening Welding Helmet 1.CE,ISO9001 approved 2.Best quality Automatic welding helmet 1. The design of it is very fashionable, and ... of high quality, optical coating, and protection for sheilding ultraviolet and infrared rays(level of protection: 15) are adopted to protect welding operator ... ---- DIN4, and the other dark state--- DIN9 to DIN13 best quality auto darkening welding helmet