Rain Bird Shrub Adapter - Plastic, Adjustable Spray Pattern, Female Thread, Black - Bag of 1 | Adapts Nozzles for 1/2 in. MPT Risers in the Underground Sprinkler Nozzles department at Lowes.com
Shrub Adapter PROS-00 1/2" Inlet - IB&S
Rainbird PA8SPRS Plastic Shrub Adapter with PRS | eBay