?HIGH QUALITY - Made of chrome plated copper,durable construction that is corrosion resistant and the surface is smooth and shiny. The inner has a sealing ring with high elasticity for better sealing property
?DESIGNED FOR - Can be used for CO2 regulator at the aquarium,will allow you to maintain ideal CO2 levels for optimum growth.
?HASSLE-FREE INSTALLATION - Easy to install, no high installation skill required
? DIFFERENT SIZE - 4 sizes available, you can choose the right one you need
?SATISFACTION GUARANTEE - We care for all customer's feeling.If this product does not meet or exceed your expectations,please send it back for a 100% refund no questions asked.