Clscea Co2 Bubble Counter With Check Valve For Co2 Generator Regulator Planted Aquarium Aluminum Alloy Silver

Screw connection compatible with many CO2 needle valves. Easy to set up. Built-in high-quality check valve to prevent back-siphoning. The bubble counter is designed to accurately monitor air-flow rate it helps to keep and maintain a healthy aquarium. DURABLE: Both ends are made of aluminum alloy to avoid softening or breaking; The middle transparent cylinder is made of PC (bullet-proof glass) injection molding mode more robust safer and more pressure-resistant than acrylic or other materials. It needs to be filled ¾ with water before use. Compatible with 4/6mm (3/16 inner diameter) Co2 tubing. Quality inspection one by one rather than random inspection! We are serious about quality control and buyer experience! If there are any questions suggestions or ideas please feel free to contact us.