This product comes to us from CM Becker and is part of the Inline flow control compensator. It is designed for use with the flow compensator only. It can be used with tubing that has an inside diameter (ID) of 3/8".
Three Piece Airlock
Star San Sanitizer - 16 fl oz (473 ml)
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Citra Hop Pellets - 1 oz (28 g)