1.Eagle Solar Auto Darkening Electric Mask Welding Helmet 2.Auto Darkening Welding Helmet KM9000 3.Automatic Variable Solar Auto Welding Helmet 4.Black High Quality Welding Helmet KM6000 5.American Type Welding Protect Helmet 6.Skull Solar Powered Auto Darkening Welding Helmet 7.110x90mm Auto Darkening Filter 8.Adjust Solar Auto Darkening Grinding Welding Helmets 9.Auto Darkening Welding Helmet KM1100 The main technical requirements 1. Size: The effective observation of size is not less than 90 mm x 40 mm. 2. The original performance: light shading, ultraviolet/infrared transmittance, parallelism should comply with the provisions of the GB3690.1-83. 3. Strengthen performance: the observation window at room temperature with 45 grams of steel ball falling from the height of 0.6 m free continuous impact three times should be without any damage. 4. Response time should comply with the relevant provisions. www.edaweld.com