SR-F306 This new High Gain flexible antenna for Garmin Astro 220,320,430 ,Garmin Alpha 50 and 100. Compatible Model:Garmin Astro 220/320/430 and Garmin Alpha 50 and 100. This model is getting more and more popular due to its performance and rubber coated structure which making it one of the best Garmin antenna on the market.
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