Designed specifically for JPC-7 and PAC-12 multi-band portable shortwave antennas, effectively improving antenna efficiency and enhancing signal transmission and reception capabilities. Made of high-quality aluminum tubing, lightweight and durable, 32cm in length (excluding screws), easy to carry and install. Extended vibrators can be flexibly combined. For multiple units stacked, it is recommended to use a pull rope for fixation to prevent shaking when raising and lowering the antenna and enhance stability. Usage suggestions: When adding multiple vibrators, it is recommended to connect a pull rope between the vibrators to reduce stress from vigorous movements and extend service life. Suitable for amateur radio communication, field emergency communication, and other scenarios, improving antenna performance while maintaining portability. Color: Black Material: Aluminium Specification: 4 pieces Package Contents: 4 * Extended eledments Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.