We are offering manual welding helmet. Filter size(mm) 110¡á90¡á9 Viewing area(mm) 98¡á40 Light state din.3 or din.4 Dark state din.9-13 Switch time(s) 125000 Delay time(s) 0.6 Power onoff fully automatic Power supply solar- li , no battery change required Rate of uv transmittance 313nm Cartons
