supply of light weight auto darking welding helmet , light weight auto darking welding helmet for welders of mig mag welding work. standards- ce: en379:2009; en175:1997. specifications should be. 1) viewing field- 96x39 mm (approx.) 2) switching time-0.1 to 0.3 ms (light to dark) 3) delay time- 0.1 to 0.8 sec. (dark to light) 4) uv/ir protection- up to sha de din 16. 5) weightnot more than 500 gm. 6) operating temp- -5 degree c to 55 degree c. 7) shell mate rial- polyamide nylon/ pp (fire proofing),( note: 03 nos. protective glass plate/shielding glass should be prov ided with each auto darking helmet.) [ warranty period: 30 months after the date of delivery ] ]