*PLUMBERSSTOCK EXPERT* responded:
Hi, there! That's a good question. The colors for each nozzle signifies the performance level of the product in a certain PSI (pressure per-square-inch). For example, this Rainbird MP06, at 35-psi, can cover a radius of 37-ft, while the Rainbird MP08 model, at 35-psi, can cover a radius of 38-ft. For reference, you can take a look at this technical sheet , and see page two, to compare each of the Maxi- Paw sprinkler nozzle performances. If you are interested in purchasing this product, don't hesitate to click Add to Cart, enter your zip code and you're all set. You can also contact us @ 435-868-4020 or via E-mail @ support.plumbersstock.com. Thank you and have a wonderful day!