A bubbler with a 6-arm tree perc and a 18mm flower bowl.

This portable bubbler is what's missing from your collection. The "Polly-Ann" 6-Arm Hammer Bubbler won't break the bank. This item features a diffused tree-perc down-stem and a 18.5mm female joint / fitting which allows for use with a 18.5mm male attachment. A 18.5mm flower bowl is included.