The Airbrush Company offer this good-quality Viton O-ring (non-official part) to fit the 
valve piston of the air valve in the NEO-CN and BCN as the official Anest-Iwata O-ring is only available with the replacement 
air valve assembly.
For more information or advice on this product, please contact us.          
This part fits the following models:
Click on each to view parts diagram and full parts list