The manufacturer informs:

Acrylic co2 bubble counter diffuser with suction cup attachment and built-in non-return valve. Its special 'V' shape allows the co2 tube to be connected directly from above, avoiding risky flexing of the tube that causes bottlenecks in the flow.

• 3 functions in 1 product.
• The ceramic diffuser ensures the best diffusion of CO2.
• The non-return valve effectively prevents the return of CO2
• Clear reading of bubbles allowing accurate dosing of CO2.
• Made of high quality acrylic, which guarantees durability.
• Compact size, easy assembly through the included suction cups.

Diameter of the porous septum: 13 mm.