【Auto Darkening】The COOZAMING true arc auto darkening welding lens have 2 sensors, and can automatically darkens or lightens depending on the light around it in just 0.12 to 0.20 milliseconds. With it, you will be able to stay focused and line up perfectly without lifting the helmet up or down when welding 【Shade 10 & Real 1/1/1/2 Optics】This 2x4 clear welding lens use true color blue technology, which can provide ultra clear view and protect against retina burns and vision loss induced by UV and infrared light. This lens are suitable for various kinds of welding processes like MMA, MIG, TIG, PLASMA CUTING. Please note, for TIG welding process, it is better to set the arc current under 60A when you use this welding lens. 【Standard Dimension】2" X 4.25" Auto Darkening Welding Lens suits most pipeline helmets and Pancake welding shields. Please make sure the size of the lens is what you are looking for 【Accessories】One cover lens to protect the lens. Two button cell batteries (CR927) 【Customer Service】If you have any questions, please feel free to contact us, we will be happy to assist you within 24 hours › See more product details