Bubbler on a 5" stick with a 1/4" barb inlet has an adjustable flow to provide 0-30 gph at 20 psi. A gentle umbrella pattern covers a 1' diameter. Insert into 1/4" (.170 I.D.) drip tubing and it has a 360° spray pattern. There is an attached transfer barb for an easy connection. These come 25 to a bag.