Description:This is a 4 in 1 high performance CO2 diffuser for DIY CO2 system (1-2 Bar) and compressed CO2 system, for up to 300L aquarium. This Co2 atomiser with build in multi-funional all in one, included check valve, bubble counter, ultramicropore atomization and U-shape air intake. Suction cup is also included for mounting.Features:1.This is a 4in1 highperformance CO2 diffuser for DIY CO2 system (12 bar) and compressed CO2 system, suitable for aquariums up to 300L.2.This carbon dioxide atomizer has built-in multi-functions, including check valve, bubble counter, ultra-micropore atomization and U-shaped air inlet, suction cup is also included.3.It is convenient to use, easy to install, and has a good refinement effect.Package included:1 x 4 in 1 CO2 diffuser.