This is the original flexible antenna for your Garmin Astro/Alpha receiver. We are very flattered at all the copycats out there....If it doens't say Original Flexible on the antenna you're getting a knockoff. Increases range over the standard rubber antenna supplied with the Astro/Alpha. Some customers have reported up to a 50% increase in range. I will not claim that much added range but it will out perform your stock antenna and in some cases the folding antennas. Antenna is made to withstand abuse and it measures 14".