This is a 3″ copper bubble plate with a two bubble caps and a single downcomer. This can be added into your 3″ system anywhere that two ferrules meet. The vapour will condense and percolate on top of the plate, acting as a mini thumper and boosting ABV. Best used below a 3″ sight glass or window section so you can watch it bubble before your eyes.
Use it to upgrade your 3″ pot or reflux column, or build your own plated 3″ flute column with several of these between several sight glasses or window sections.