1 GPH, Drip Spike, A Landscape & Nursery Dripper Incorporating An Anchoring Spike That Delivers Precise Amounts Of Water Direct To The Plant Root Zone, Pressure Compensating Spike Dripper Has A Sealed Turbulent Flow Path & Diaphragm To Maintain Uniform Discharge Rates Over A Wide Range Of Pressures, Turbulent Flow Path & Self Flushing Action With Insect Baffle To Minimize Blockages, Inlet Barb Has Built In Filter, UV Stabilized Materials For Long Life.