The Shimano Sora FC-R3000 9 speed double chainrings are the perfect replacement for worn or damaged chainrings
The chainring teeth have been developed to work only in conjunction with Shimano HG 9-speed chains for improved contact providing more efficiency and improved power transfer
Genuine Shimano replacement chainrings for the FC-R3000 cranksets available in 50T (Outer ring), and 34T (Inner ring) 
Shimano part numbers: 50T-MP - Y1VC98010, matches 34T-MP - Y1VC34000
Compatible chain Shimano HG 9-speed