Oxygen cones. 
 It is mainly used in fish farms to mix water with pure oxygen and transfer it to the system. 
 Available in the following sizes. 
 Water permeability: 30 T / h 0.3mpa 
 Water permeability: 60 T / hour 0.3mpa 
 Water permeability: 110T / hour 0.3mpa 
 Water permeability: 150T / hour 0.3mpa