Allows fine tuning of spray, ensures positive nozzle retention. Easily adjustable 360 from top of sprinkler, up, , Quick check arc/fast forward. Stops wasteful excess . Keeps speed regardless of nozzle size or pressure. Easy to handle and convenient to . Applicable to green belt,flower bed,lawn irrigation. Rate: 0.4-1.5 /h Applications:Nozzle Atomizing,Agriculture Irrigation,Industry Irrigation,etc. colour:Black Material:plastic size:15 x 1.94CM Package Contents: 10 x Irrigation Sprinkle Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.