Allows fine tuning of , ensures positive nozzle retention. Easily adjustable 360° from top of sprinkler, up, down, Quick check arc/fast forward. Stops wasteful excess flow. Keeps rotation speed consistent regardless of nozzle size or pressure. Easy to handle and convenient to use. Applicable to green belt,flower bed,lawn irrigation. Flow Rate: 0.4-1.5 m3/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 cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.