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Basic Welding Helmet with No. 10 Lens (4-1/2 in. x 5-1/4 in. Viewing Area) This 4-1/2 in. x 5-1/4 in. Welding Helmet This 4-1/2 in. x 5-1/4 in. Welding Helmet with No.10 Lens can be used with a magnifying cheater lens if needed. It is ANSI certified and features a rugged and durable clamshell design.May 29, 2018 lens is then placed in the generator, or grinding machine, and the flat back of the lens is ground into the correct shape. After the lens is correctly curved, it must go through a series of polishing, beveling and sterilization treatments, often performed using a fining machine and several other tools, such as soft sandpaper.Jul 15, 2021 Lens shade range level DIN 9 13 with DIN 4 at light mode shading that lets you see clearly. Grinding button External button for grind mode Weight 1lb (lightweight) What is Unique about it It is one of the most popular and top choice budget options. This helmet has a very good build quality being made of polyamide nylon, it supports the ...

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