Photo Studio Monopod Dslr Camera Microphone Stand With Carbon Fiber Tripod This center column is made of carbon fiber, more durable and corrosion-resistant. 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. 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. tripod extension rod weighs only 120g (4.24oz) and is only 7.5in (19cm) tall when reduced?making it easy to carry and store Easily and quickly loosen the twist lock and extend the center column to an ideal height?then tighten the knob to fix 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.