Power Comm's Antenna Spring, model 215-22100, is a medium-duty spring with a 3/8"x24 threaded mount designed for use with antennas up to 34" in length. It is compatible with a wide range of CB radios and features a durable chrome-plated metal construction. The "Rock The Whip" design provides a reliable and efficient signal, making it an ideal choice for communication needs. Each unit quantity includes one antenna spring, ensuring a quality and reliable addition to your communication setup.