Used Garmin Factory Extended Range Antenna - wil work on Alpha 300/300i, Alpha 200/200i, Alpha 100, Alpha 10, Astro 430, Astro 320 and Astro 220.  It will also work with the Pro Trashbreaker and Pro 550+.

This is a used 13-inch flexible, long-range VHF antenna includes up to 30% increased tracking range when used with the Alpha® or Astro® systems.