Rain Bird 214752 FC/PC Arm Lever Assembly for 551, 552, 751 and 752 Series Rotors - This FC/PC Arm Lever Assembly is for use with Rain Bird 551, 552, 751 and 752 Series Rotors. Made for easy installation and use, this assembly will help ensure the best service life possible. Rain Bird rotors are engineered to deliver a low precipitation rate, so you can cover more area over a longer period of time.