Description： -Inlet Connectors, (Tank Connectors): Oxygen CGA-540 / Acetylene CGA-510 -Oulet Connectors, (Hose Connectors): 9/16" - 18 R&L Type B-B -Uses: Oxy-Fuel Welding/Oxy-Fuel Cutting -Medium to Heavy Duty Regulators - Body: Forged brass, Bonnet: Powder Coated, UV resistant Code Color Composite Knob Package Including： 1*Oxygen (CGA-540)Regulators 1*Acetylene (CGA-510) Regulators Note： Please make sure that the model and appearance of your equipment are exactly the same as our products. It is the customer's responsibility to buy the right products. If you are not sure, please contact us in time. Thank you for your cooperation. .