These Hunter S-Type spray pop-up sprinklers are ideal for small turf and landscape area. They have an adjustable arc. Well suited for odd angles in meandering landscapes. No assembly -- nozzle is integral part of sprinkler. All spray heads have 4 inch pop-up to clear grasses and most ground covers. All sprinklers have 1/2 inch female pipe thread inlet. Ideal working pressure is between 20 and 40 psi. Available in 10 foot, 12 foot, 15 foot, and 17 foot nominal radiuses. Between 20 and 40 psi the 10 foot radius model uses between 1.4 and 2.4 gpm when set at 360 degrees. Between 20 and 40 psi the 17 foot radius model uses between 3.7 and 5.3 gpm when set at 360 degrees.