The Argon Helium Flowmeter Regulator Welder was a huge disappointment. Based on my observations, the product was poorly made and did not work at all. The design was also very confusing and did not follow any industry standards. The only positive aspect of this product was its affordable price. However, I would not recommend buying this product, as it is a complete waste of money.Industrial and Scientific buyers should look elsewhere for a more reliable and efficient product.