1. Scope of Application: Suitable for welding, electronic, etc. 2. High-quality: Zinc Alloy and ABS materials, strong sealing, safe and reliable. 3. protection: The head has a to protect the meter for a long time. 4. Clear scale: The dial scale is clear and precise, and the operation is more convenient. 5. Compact structure: Full copper air inlet connector, air outlet connector, no discoloration, no rust. Name:Oxygen regulator Model Number: Pressure Reducer Tracheal Interface Diameter: . 8mm / 0.3inch Applicable Gas: Acetylene / Oxygen colour: green Material: Zinc Alloy + ABS Package Contents: 1 x Oxygen regulator Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.