Manually operated counter pressure bottle filler in stanless steel.
For filling bottles without foaming and lost carbonation. 
7 mm hose barbs (beer in + gas in).
Silicone bung gives a tight fit for bottles with 14-20 mm inner diameter openings.
Fits bottles with a minimum height of 22 cm. Shorter bottles are possible by shortening the tube.
3-way top valve (gas in, beer in, closed), lower valve lets gas out of the bottle as it is filled.