3 Review(s)

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.