【Widen Hook】The inner width of the hook has been widened to 2.8cm (1.1inch). The tank that with rim can also be adapted. Fits 4/6mm (3/16" Inner Diameter) CO2 tubing.
【304 SUS】High quality 304 stainless steel, durable and rust free.
【Metal check valve】John Guest Fit Design 2-in-1 check valve, easy to install/remove CO2 tubing.
【Fine bubbles】High density ceramic disk make uniform bubbles. The disk can be cleaned/replaced.
