Raindrip 15600UB Full Circle Adjust Bubbler Stake-Stream Spray, Loose, 5-Inch Converts existing 1/2" underground sprinkler systems to low flow watering where a drip circuit can't be set up Adjustable bubbler rotates easily to preferred water flow - from full coverage for shrubs and large potted trees to shut-off position Barbed connector attaches 1/4" tubing to this sturdy, easy-to-plant stake