Description
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 material
