Auto darkening Welding Helmet 1.CE,ISO9001 approved 2.Best quality Automatic welding helmet 1. The design of it is very ... , neck, ears and so on.2. liquid crystal of high quality, optical coating, and protection for sheilding ultraviolet and infrared rays ... shade---- DIN4, and the other dark state--- DIN9 to DIN13 best quality auto darkening welding helmet