Sintered air stone diffusers are often used for gas distribution and air aeration. They have a wide range of pore sizes from 0.2 micron to 120 microns allowing small bubbles to flow through it. They can be used for gas transfer aeration, generating high volumes of fine, uniform bubbles often used for the treatment of waste water, volatile stripping and steam injection. With greater gas/liquid contact area, the time and volume required to dissolve gas into liquid is reduced. This is accomplished by reducing the bubble size, which creates many tiny, slow moving bubbles that result in a large increase in absorption.