I am converting a Real 737-300 landing gear assembly to NG specs and needed the smaller knob to match the one used on the NG. I purchased another knob from another vendor only to find that it was the same large knob I already had on the -300 landing gear lever. Geremy to the rescue!! This is the accurate size for the job. The knob was just a little cloudy and sort of opaque but 3 minutes on my buffing wheel and she cleared right up. Thanks Geremy!!!