safety welding helmet, item# HF404; PP material; size of veiwing window: 108*50mm*3mm; shade number of glass: from 5# - 13#; safety welding helmet, item# HF404PP material;size of veiwing window: 108*50mm*3mm;shade number of glass: from 5# - 13#;easy to use, and convenient to see,can be turned up to see clear.packing: polybag, box; safety Welding helmet