Seco 1 m Aluminum Extension – 1.25" OD - Flo Yellow The Seco 5143-00-FLY is a durable aluminum pole extension designed for increasing overall height 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 field configurations and consistent alignment. Key Features • Aluminum construction for lightweight durability • 1 m extension length • 1.25" (32 mm) outside diameter • 5/8" x 11 male/female threaded ends for stacking • High-visibility flo yellow finish