... easy observation, lens size: 7-13# optional China TIG/MIG/ARC/PLASMA welding Safety Welding Helmet ApplicationsWidely used in high ... environment with stronger safety protection needs, suitable for Tig welding, Mig welding, Arc welding, and plasma cutting etc.Specifications1). Frame ... 5000 welding hours)Working temperature -5°C-+55°CView size 90*32mmUV transmittance 313nm<=0.00006% ,365nm<=0.000076%IR ...