DIG 410B Adjustable Drip Sprayer on Spike 0-20 GPH Upto 12' Diameter (3 Pack) Available in 360 degree spray pattern for individual plants or closely spaced plantings Recommended for planter boxes, large pots, flowerbeds, groundcovers, and shrubs Rotation of the cap allows control of flow and the diameter of throw Adjustment via a ratchet mechanism on the cap and a notch on the base allows for control of flow and pattern depending on plant requirements, down to a complete shut-off Can be extended with 1/4" micro tubing or connected into the 1/2" drip tubing