The WS03X10028 GE Smartwater Filter O-ring fits the following GE SmartWater Reverse Osmosis Filter Models: SmartWater PNRV12ZWH01, SmartWater PNRV12ZBL01, and SmartWater GXRV10ABL.
The dimension of the GE WS03X10028 O-Ring: 1 19/32" I.D. X 2" O.D. This SmartWater Filter O-Ring is used with the FX12M GE SmartWater Reverse Osmosis Membrane. The FX12M membrane should be replaced every 3-5 years or when the indicator shows that it is time to be replaced.