Irritrol's 550RS 3/4" Shrub Rotor Sprinkler comes from the 550R Series. It has a 3/4" female thread. The 550RShas a flow rate of .74 - 9.7 GPM. It has a 40 - 360-degree spray arc. The 550RS has a 25' - 50' spray radius. It has a pressure rating of 25 - 65 PSI. Irritrol has made their name as a brand by selling and marketing exclusively to the professional installer, as a result their products are geared to be dependable and durable. Irrirtrol is now making their products available to you through our website. If you are looking for a product line that will last year in and year out, Irritrol is the brand for you.