This is a shorter cover similar to boopidoo's spinner cover for the RVJET. it is designed to fill the gap between the RVJET fuselage and the spinner that comes in the RVJET renewed power package. Contains cooling ducts to help transfer air out of the ESC pocket and electric motor. This should be glued directly to the rear of the fuselage. When I printed the original spinner cover, I found that it was too long, preventing the spinner from being able to get an adequate hold on the motor shaft. So, this is a shorter cover. This has been updated to be the final version. Height is around .906 inches.Modeled in 123d Design. Printed on a 3DSystems Cube.