Product review (5 stars): Just the perfect piece of plumbing.
This little contraption was a godsend. I needed to connect the drain line from my R/O system to my sink drain but I had very little room on the tailpiece with the dishwasher stem as well. I used this to connect both the R/O and the dishwasher to the one sink drain tailpiece dishwasher stem. Perfect. Nothing else like this that I could find!