Tuneable / Adjustable 48" Firberglass CB Antenna Whip - 3/8-24 Thread Rugged, flexible, 48" fiberglass replacement whip Tunable from 26.8 to 27.5 MHz Standard 3/8" x 24 thread fits all common CB mounts Can be adjusted at base and fine-tuned for the desired channel, Standard 3/8 - 24 thread.