This inlet fits the FlyFly F-86 ONLY and is formed with .040 plastic. The fit is tight enough to hold it in place with tape from the inside, or can be epoxied in place.This addition does not change the inlet size at all however it does give the model a better scale appearance by giving the nose a more tapered look. The final trim line is 3/16 aft of the factory seam to hide it. Trimming and paint is required.