The original patented Shrubbler® with flow adjustment. Flow and coverage can be altered by rotating the cap. Features Fingertip flow control with shut-off option. Barb model for direct attachment to micro and supply tubes. 4 mm threaded model for installation into Rigid Risers and Asta® Stakes. 1/2″ threaded model for pvc pipe installations. Applications Pots, tubs, landscaped gardens and nurseries. Ideal for hanging baskets. In-Line Spike model suitable for planter boxes.