Rain Bird 3504-PC-SAM Part Circle Rotor Pop-Up Sprinkler w/Seal-A-Matic Check Valve Top-adjust arc adjustment requiring only a flat-blade screwdriver Three year professional customer satisfaction policy Shrub and 4" models available True 4" (10 cm) pop-up (measured from center of nozzle) 40 360 degrees Arc Part-Circle arc rotation and reversing Full-Circle rotation in one Attachable nozzle tree of six Rain Curtain nozzles Radius adjustment screw allows up to 35% radius reduction without changing nozzles Quick Check Arc/Fast Forward Dual action, positive stop wiper seal protects