Rain Bird X54000 TS025 Universal 1/4" Drip Tubing Stake Holds 1/4" Distribution Tubing and emitter or Diffuser Bug Cap firmly in place at the root zone of the plant. Designed to securely hold Rain Bird and other manufacturers' 1/4 in drip distribution tubing: 0.16 in to 0.18 in I.D. and 0.22 in to 0.25 in O.D. Rigid stake featuring a flat enlarged head designed to withstand hammering into tough soil. NOTE: if emitter is installed at inlet to distribution tubing, use a Diffuser Bug Cap at outlet of tubing to prevent bugs from clogging tubing and to help hold tubing in place