Seco 3 in Aluminum Extension – 1" OD The Seco 5182-001 is a compact aluminum pole extension designed for fine height adjustments in GNSS and surveying pole systems. It features 5/8" x 11 male and female threading , allowing multiple extensions to be securely stacked for flexible and precise pole height configurations. Key Features • Aluminum construction for lightweight durability • 3 in (7.62 cm) extension length • 1" (25 mm) outside diameter • 5/8" x 11 male/female threaded ends for stacking • Ideal for precise GNSS and survey pole height adjustment