Auto -darkening Welding Helmet 1) Model: ZTG-5 GRAY 2) Adapt to CHINT ADF FS-B2; FS-B4; FS-B4a, FS-B5; 3) Material: Nylon 4) Fire resistance: yes 5) Dimensions: 345mm×230mm×210mm 6)Color: red or black, according to your choice. 7)Frame Size114×133×6.2mm 8)Viewing Area96×46 mm (3.79 ×1.81) 9)Range of UV/IR protectionup to shade DIN 16 all time 10)Light Shade DIN 4 11)Dark Shade from DIN 9 to DIN 13 12)Power on/off Automatic 13)Switching Time (light to dark) 1/25,000s (dark to light) low to high 0.05-1.2s choice of 4levels,red LBD direction 14)Sensitivity: low to high choice of 4levels,red LBD direction, adapt to TIG,MIG 15)Power Supply Solar cell and two 3V lithium batteries 16)Operating Temperature -5 55 17)Storage Temperature -10 70 Packing methods: (1). 4 pcs of helmets packed together in one carton( normal). Size of carton: 540×534×316mm (2). 10 pcs of helmets packed in one carton( economical). Size of carton: 742*534*290mm (3). 20 pcs of helmets packed in one carton (economical). Size of carton: 742*534*440mm