Siretta delta direct connect antennae siretta delta12axbncmss17 this siretta delta 12a antenna is a direct connect cable free ism band 14 wave whip antenna tuned to 433 amp 458mhz the antenna achieves a gain of 3dbi and has a flexible rubber housing making it ideal for any quick fit ism application siretta delta12axbncmss17 433 amp 458 mhz 130mm flexy rubber 14 wave whip an