Antenna is made of 201 stainless steel, with a four-slot reinforced riveting design, and the copper parts are inserted , making it more sturdy and practical. 5.6M/18.4FT GP whip antenna suitable for amateur radio users DIY shortwave antenna antenna. Can be used with DIY shortwave radios and telescopic antenna elements. It can also be used for DIY positive V antenna, GP antenna, and antenna. Special process: The bottom are all made of secondary reinforcements to change the stress points and make them stronger and tighter. Of course, folding and unfolding takes a little more effort than a regular telescopic antenna. Therefore, upright shaking can be reduced and automatic retraction can be avoided, thus extending its lifting span. When extending, it is recommended to pull out section by section from the top, and when retracting, it is recommended to retract section by section from the bottom. Part name: telescopic antenna Expanded length: 5.6m/18.4ft Number of sections: 14 sections Size: Folded length: 50 cm/19.7 inches (including nuts) Connection nut: M10 (external thread) Colour:Silver Material:201 stainless steel Package Contents: 1 * Shortwave Antenna 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.