Raindrip 25' Pre-assembled Bubbler Kit. Convert one sprayhead to 4 precision-watering bubbler emitters. 4 Pre-assembled Clamp-N-Pierce Bubblers with stakes. Connect easily anywhere along supply tubing. Adjustable bubblers allow you to adjust water as plants grow. Tool-free 20-minute installation. Large volume solution for trees and large shrubs. Not for watering turf. Includes: (1) 6" Cut-to-size riser (1/2" MPT); (1) 25' Pre-assembled poly tubing with 1/2" riser swivel adapter and end plug; (4) Pre-assembled Clamp-N-Pierce full circle bubbler assemblies; (4) 8" Wire stakes; and (1) 5/8" Filter washer.