Solid fibreglass former with flexible spring top & coated with black polyolefin rubber on a 5/16" fitting. The RDRM146 works best when mounted onto a bracket that is as close to the surface of the ground plane as possible such as the BMS mount (Z brackets are not recommended with this antenna)

Recommended Accessories - UL12BNC or UL12C with BMB or Mag12C

Note: You can use a spring SAL or SAO but the antenna will need to be re-tuned on the spring.