["Description:\nbrand new and high quality\nFeatures:\nHigh quality, durable and not easily damaged.\nPrecise structure made of durable copper that regulates the release of CO2.\nSpecial copper-grinded surface, light weight, easy to operate.\nErgonomically design, easy to install without using any tool.\n2 styles are available to suit different needs.\nIt features a non-return function to prevent the backflow when the pressure changes.\nCo2 regulator for valve applies nut lock design can effectively lock the CO2 tube, to prevent the accidents caused by loose.\nAquarium Valve-Regulator Diffuser Single-Head/Dual-Head CO2 only, other accessories demo in the picture is not included!\n\nSpecifications:\nMaterial: Copper\nOptional size: Single for head, Double for head\nSingle for head size: app.3.8x2.9cm/1.50x1.14in\nDouble for head size: app.4.3x2.9cm/1.69x1.14in\nColor: As the pictures shown\nOptional style: Single for head, Double for head\nQuantity: 1Pc\n\nNote:\nNo retail package.\nPlease allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\n\nPackage Includes:\n1 x Aquarium Valve-Regulator Diffuser Single-Head/Dual-Head CO2"]