Provides a Better Radio Experience - Marketty knows that more than 89% of people love broadcast radio when driving. In order to have a better listening experience, our SS-3H CB antenna spring is made of durable, top-grade electro-polished stainless steel, and is finished in matte black by electroplating and polishing which this antenna spring is so strong and durable | Design for Your CB Antennas - Our CB radio antenna mount spring installs between the mount and antenna and provides flexibility in the event that the antenna is hit or jarred. The CB antenna mount fit Mobile/in-Vehicle CB Radio Antenna Mount up to 60" long and standard 3/8" x 24 threads to fit Fire-stick antennas, which perfect fit for off-road vehicles, vans, trucks, RV, motorhomes, boats, and so on | Easy to Operate - Screw the CB antenna spring into any CB stud or mount, and then screw the antenna into the top of the disconnect. Spring can also be used with a quick disconnect; they're simply stacked/screwed on top of one another. Every antenna should have a Marketty spring to protect the antenna, mount, and vehicle | More Antenna Spring Details - Marketty SS-3H CB antenna spring upper and lower inserts are made of chrome-plated machine brass. Each antenna spring is about 3.0", has Excellent strength fits like a glove to a Radio Shack "twin mirror" type, nice glossy finish | What You Get - Get our new antenna springs to start your listening journey and also get our 100% VIP customer service. TIP: Marketty only provides only top quality CB antenna spring which please buy with confidence