Caution: color: we ship according to the color of the first picture, in the package: If the quantity is not stated in the description, we will ship the item according to the quantity and model in the title.If the title does not have a quantity, it is 1pcs. Diss/barb 3000psi cga540 oxygen pressure regulator oxygen inhaler flowmeter dropshipping 2 the product is shipped based on the color or size of the main image of the product page. 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.