Seco 25 cm Carbon Fiber Extension – 1.25" OD The Seco 5145-02 is a lightweight carbon fiber pole extension designed for modular height adjustment in GNSS and surveying pole systems. It features 5/8" x 11 male and female threading , allowing multiple extensions to be securely stacked while maintaining stability and alignment in the field. Key Features • Carbon fiber construction for high strength and low weight • 25 cm (0.25 m) extension length • 1.25" (32 mm) outside diameter • 5/8" x 11 male/female threaded ends for stacking • Ideal for GNSS and survey pole height customization