Features: The 28.5mm carbon fiber buoyancy stick with 1/4inch thread prevents underwater sinking, offering superior floatation for cameras during diving or photography. Its lightweight carbon fiber construction ensures corrosion resistance and ergonomic 28.5mm grip, compatible for most devices via universal 1/4inch threading. Design for underwater photographers, travel bloggers, and diving enthusiasts requiring stable, durability gear in aquatic environment. Ideal for marine exploration, snorkeling trip, or capturing steady shot in pools, oceans, or outdoor activity scenario. compactly enough for backpacks storage, this buoyancy extension rod maintains equipment safety while resisting saltwater damage during prolonged use. Specifications: Component: Carbon fiber Process: High-strength composite materials manufacturing Outer Diameter:Approx.28.5mm, 1/4 threaded interfaces Length:Approx.25.2cm/9.921inch Color:Black Suitable for underwater photography, outdoor sports and other scenario, providing additional buoyancy to prevent the equipment from sinking into the water Package Includes: 1pc Extension Rod 1pc Screw 1pc Tool note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.