Flow Meters & Controllers features: Diss/barb 3000psi cga540 oxygen pressure regulator oxygen inhaler flowmeter dropshlpping(2) Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. Colour:2 100% brand new and high quality OOTDTY Features: Made of high-quality metal material, corrosion-resistant, high hardness, not easy to deform, sturdy and durable, and has a long service life. Ideal accessory or replacement part to replace the original worn or broken flowmeter. Oxygen pressure regulator, suitable for oxygen inhaler flowmeter, oxygen cylinder flow meter, perfect for hospitals, clinics, nursing homes, home, etc. Specifications: Material: Metal Size: app.144x35mm/5.67x1.38in Color: Black+Green+Silver Optional Styles: DISS, Barb Quantity: 1pc Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 x Oxygen Pressure Regulator (other accessories demo in the picture is not included.)