Spectra Geospatial Carbon Fiber Base Pole Extension, 25 cm Configure a compatible Spectra Geospatial GNSS receiver for UHF base station operation with this lightweight carbon-fiber pole extension. The 25 cm extension features an oblong cable opening that allows the coaxial antenna cable to pass through the pole when connecting the receiver's UHF radio module to an external antenna. Key Features 25 cm (9.84 in) extension provides additional clearance for GNSS base station and radio configurations. Lightweight carbon-fiber construction with a 32 mm (1.25 in) outside diameter. Oblong cable aperture allows a coaxial antenna cable to pass through the extension to the receiver's UHF radio module. Genuine Spectra Geospatial accessory supplied with compatible SP Series UHF radio kits. Compatible With Spectra Geospatial SP Series GNSS Receivers: SP85 , SP80 , SP60 Compatible Spectra Geospatial UHF radio module and base station configurations