Helmet lenses.
Do two 5's on top of one another = 10?
Does 5 + 5 = 10?
Oct 20, 2005
2 Replies
First reply
Won't get into the math thing, The darkest Filter Plate I have owned is No. 14, use this for heavy Alum. TIG welding, have stacked Plates together, your Math is OK by me. Phil
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