This is a replacement Antenna for the Garmin Alpha. Regardless if a dog or Puppy chewed up your Alpha Antenna or if you broke it Double U exclusively offers this Replacement Antenna's. Antenna's are Stainless Steel, with a Floresent Bright coating. Due to the way the Garmin Alpha antenna's are assembled, you will need to install the antenna and then place the rubber cap on. this is a Double U Stainless steel Tuff Skin style antenna specifically made for the TT 10 Antenna and Garmin TT15 Antenna. You can also use this antenna on a DC30 or DC40 collar with the same great range and distance of our Stainless Steel Tuff Skin antennas.