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Welcome to J & R Welding Supply Co. Smith Equipment is a leading manufacturer of specialty gas regulation equipment. Regulators: General Purpose. High Purity Analytical. High Purity, Corrosion Resistant Stainless Steel. High Purity, Brass. High Pressure Regulator. Cryogenic Regulator. On Orders Over $175.00 All products subject to availability. Prices are subject to change. If you don't see an item you want or need replacement parts E-mail us for a quote. Our E-mail Address is: jr@jandrweldingsupply.com