These crystals fit any Hitec FM Transmitters in the 72mhz band. These TX xtals typically have "HTF" or "TF" printed on a white or white with black cap. All channels listed, but does not guarantee availability.
Word to the wise: Not sold by Hitec, so very hard to get. Must part out radio systems to get them. Our experience is that changing a TX xtal in a Hitec TX is a BAD IDEA. It will work and you'll range check well, but you'll pick up side bands and become a source of interference to other pilots. Regarding our Crystal Exchanges, we won't accept anything for a Hitec FM TX xtal except a Hitec FM TX xtal. Set the right example here and treat your fellow modeler with respect, get the retune done.