Ehle Pre-Cooler yellow, 2 x 14.5mm,

This Ehle pre-cooler has twice a 14.5mm joint size, thus fits all 14.5mm pipes or with an adapter also 18.8mm pipes.
The Ehle pre-cooler has high quality processing. The glass is evenly thick, so it's less prone to break.
You put the Ehle pre-cooler into the downpipe (without bowl) of the bong.
You don't need an extra downpipe if you have stem and bowl separate.
Another downpipe is needed for the Ehle pre-cooler.
The downpipe (stem without bowl) should have a length of maximum 12cm, better 11.5cm .
Thus if you don't have stem and bowl separate, you still need:

• 1 14.5mm connector/stem for the bong - as replacement for the downpipe
• 1 14.5mm connector/stem for the pre-cooler - max. 12cm
• 1 14.5mm bowl for the connector/stem in the pre-cooler