Gas washing bottles are generally used to saturate or dry gas streams. For example, the bottle could be filled with water and carbon dioxide gas could be bubbled through the inlet tube, saturating the gas stream with water vapor as it exits to the right as shown.
This item has a hexagonal base for stability, a standard taper 34/28 top joint, and a plain tube for the gas dispersion. Models with fritted dispersion tubes are also available. This complete unit comes with two CG-110-02 18 mm stainless steel springs.
This unit is available in 125, 250 and 500 mL sizes with overall heights of approximately 290, 305, and 308 mm, respectively. The replacement part listed as "stopper" is the top section with the hose connections and dip tube while the "bottle" is the bottom portion with the hexagonal base that holds the washing liquid.