Carbon Fiber Material -- This center column is made of carbon fiber, more durable and corrosion-resistant. | Wide application -- Central Column Extender can add height to tripod/ DSLR camera/ selfie stick/ stabilizer etc, 1/4 screws and screws nuts can mount most different devices and accessories. | 2-section Adjustable -- The height of Tripod extension tube is adjustable from 7.5 inch to 12.6 inch (19cm to 32cm), Tubes diameters are 22mm and 25mm. | Lightweight and Convenient --The extension rod weighs only 120g (4.24oz) and is only 7.5in (19cm) tall when reduced, making it easy to carry and store. | Knob retractable -- Easily and quickly loosen the twist lock and extend the center column to an ideal height, then tighten the knob to fix.